P0597 code chevy cruze

Diagnostic trouble code (DTC) P0597 code Chevy Cruze definition: If your car has the P0597 code, it means that there is an issue with the Thermostat Heater Control Circuit/Open. Table of Contents How Do You Fix Trouble Code P0597? What Does Error Code P0597 Mean? What is Thermostat Control Circuit? What is Code P0599? P0597 Bmw P0597 Mini

P0597 code chevy cruze. Code P0597 Chevrolet Description. The Engine Control Module ( ECM) controls the Pulse Width Modulated (PWM) thermostat. The engine coolant thermostat …

May 24, 2014 · A C/S that the SES is on and off, advise. 4032810 - Engine Coolant Thermostat Replacement. 4274/W94. 1 55578419 (S) Thermostat. 1 25189205 (S) Seal. Found DTC P0597 Thermostat Heater Performance, performed diag and found thermostat heater open, replaced thermostat, filled with coolant, cleared code and rechecked OK. See more.

35 posts · Joined 2013. #1 · Jan 2, 2014 (Edited) The check engine light came on soon after starting one morning. Onstar diagnostic said it was a P0420 code and that the fault was not present anymore. They they stated that the light would go away after 7 engine starts (it didn't). I took to dealership.I have a P0597 code for a 2014 Chevy Cruze. Do I need to replace the thermostat or something else. Mechanic's Assistant: Okay, I'll connect you to the Mechanic to go over that information regarding your Chevrolet Cruze.Common mistakes when diagnosing the P0033 code. The most common mistake for this code is related to assuming that basic components are operating normally. Commonly, this issue is related to intake leaks, after the turbocharger to the intake throttle valve. Often there is just a hose or clamp loose which is causing a loss of pressure.P0597 code definition. The P0597 trouble code signifies that a thermostat heater control circuit is open. What the P0597 code means. If a PCM (Powertrain Control Module) stores this code, it’s because the engine’s thermostat is experiencing an issue with the control voltage. The control circuit is most likely either open or short. Does your Chevy Cruze, Sonic, or Aveo have a P0597 or P0598 heated thermostat code? In this video we will walk you through how to test and how to fix this co...What Does the P0366 Code Mean? Diagnostic trouble code (DTC) P0366 stands for “Camshaft Position Sensor B Circuit Range/Performance Bank 1.”. The camshaft position sensor monitors the rotational position of the camshaft. It sends a data signal to the powertrain control module (PCM), which controls outputs, such as the fuel injectors, …Fixednut17 Discussion starter · #7 · Mar 5, 2021. Ma v e n said: The oil cap itself has nothing to do with that trouble code. There's a small possibility the thermostat wiring or connector was damaged during the valve cover replacement, but the most likely scenario is none of these are related and you just have thermostat system failure.P0299 and P0300. Was driving my 2014 Cruze today (82,000 miles) and when trying to merge onto an interstate, i noticed I had very very little power, took forever to reach highway speeds, i immediately thought something was up and started to turn around and come home. On a stoplight on the way home, i then noticed it started idling really really ...

Code P0599 is one of many trouble codes that can be logged and retrieved from the OBD system. Read on to understand what this code can mean for your vehicle. What Does the P0599 Code Mean? Diagnostic trouble code (DTC) P0599 stands for “Thermostat Heater Control Circuit High.” This code is logged when the powertrain control module (PCM ...Buy Engine Coolant Thermostat Housing with Sensor Gasket for 2011-2016 Chevrolet Cruze 2012-2017 Chevrolet Sonic 2013-2017 Chevrolet Trax Replaces 25192228: ... (Check Engine Light) with codes P0597 - P0599 or worse the engine is overheating then you may have a problem with your coolant themostat housing.There seems to be some variation on part location between the 2011 and 2013 Cruze models, while I am right in the middle. Here's the car specs: 2012 Chevy Cruze 2LS. Engine: 1.8L L4 DOHC 16V FFV. Part: ACDelco 213-4688 Engine Coolant Temperature Sensor. I'd post some pictures but I'm a new member, so, let me know if you need any more information!PAPPANAICKENPALAYAM Pin Code is 641037. PAPPANAICKENPALAYAM is located in NA COIMBATORE, TAMIL NADU, India. What is the contact address for PAPPANAICKENPALAYAM Post Office, TAMIL NADU?2010-2016 (Gen1) Chevrolet Cruze technical bulletins, recalls, service updates, and service related issues. ... 2014 Cruze Eco with code U0101. saltmeetswound3; Apr 1 ...I received this code and was told that it was the ECT sensor. There are 2 of these sensors on my 2014 Lt. I have changed the upper one but not the one on the radiator . The CEL is still on. My question is are the 2 sensors the same part? The part I installed was from Advanced Auto, BWD WT5239...

Diagnostic trouble code (DTC) P2078 stands for “Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit High Bank 1.” It’s triggered when the powertrain control module (PCM) detects an implausible signal from the intake manifold tuning valve position sensor, which is in charge of providing the PCM with information about the tuning valve’s position.On Mach 5, 2019, error code "P0597" popped up on my 2011 Chevy Cruze LTZ. Code went away after that. My garage (I'm out of warranty here, btw, because my...What is the Cost to Diagnose the Code P0597 Chevrolet? Labor: 1.0. The cost to diagnose the P0597 Chevrolet code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.Labor: 1.0. To diagnose the P0598 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.I have a 2011 Chevrolet Cruze with a p0597 code. What does it mean and how do I repair it. ... I need wiring diagrams and troubleshooting data for b393b-0b code on a 2011 CHEVROLET CRUZE ECO SEDAN 4-DR ENGINE1.4L L4 DOHC 16V TURBO TRANS/DRIVE6-SPEED AUTOMATIC / FWD ...Here are some common symptoms and warning signs that may hint towards having a worn out wastegate hose: 1. Check Engine Light comes on. Since the wastegate hose is designed to relieve pressure inside the turbocharger manifold, it is constantly monitored by the vehicle’s ECU (engine control unit). Typically each automotive …

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Using a scan tool, command the thermostat heater off (0% on time). If a scan tool is not available, turn off the key and wait 2-3 minutes till the computer shuts down and goes to sleep mode. Make sure the test light has gone out completely to confirm the circuit is not shorted. If either of the tests above fail, check the heater circuit and ... Oct 16, 2019 · 1st Generation Chevrolet Cruze. ... 2012 Cruze with P0597 code. Jump to Latest Follow 2681 Views 4 Replies 2 Participants Last post by Ssage23, Oct 17, 2019. S. You can find common Chevrolet Cruze fault codes on this page that when clicked take you to a detailed description. ... P0597. Thermostat Heater Control Circuit / Open. Learn More. 8/10 P0106. Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem. Learn More Fixes.The P0597 trouble code signifies that a thermostat heater control circuit is open. What the P0597 code means If a PCM (Powertrain Control Module) stores this code, it's because the engine's thermostat is experiencing an issue with the control voltage. The control circuit is most likely either open or short.

Cruze Chevrolet P2096 and p0597 diagnostic trouble codes My 2012 Chevrolet Cruze LS is displaying the codes p 2096 (Post catalyst fuel trim system low limit) and p0597 (Engine coolant thermostat heating control circuit), yet the vehicle continues to operate normally.Dear readers, my Chevrolet dealer checked and repaired my 2012 Cruze LS (1.8L/Auto). (My problem was a 'check engine' indication, with accompanying radiator cooling fan running @ full, (even when starting from cold). They said it was a thermostat stuck open, and replaced said thermostat with a new one.I noticed that P0597 is code 2/6. Fully Built 1.4L (LUJ) ... discussions and the best community for owners to discuss all things related to the Chevy Cruze.Diagnose and fix P0597. The thermostat/heater assembly can generate three distinct trouble codes: P0597 – Engine Coolant Thermostat Heater Control Circuit. P0598 – Engine Coolant Thermostat Heater Control Circuit Low Voltage. P0599 – Engine Coolant Thermostat Heater Control Circuit High VoltagePost office Name : Kuppakonanpudur. Post office Type : Sub office. post office address : Kuppakonanpudur post office, Kuppakonanpudur, Coimbatore, Tamil Nadu, India - 641038. 641038 Pin code , Kuppakonanpudur Post Office Deatils. 641038 Kuppakonanpudur Villages and Sub post Offices.Common mistakes when diagnosing the P0033 code. The most common mistake for this code is related to assuming that basic components are operating normally. Commonly, this issue is related to intake leaks, after the turbocharger to the intake throttle valve. Often there is just a hose or clamp loose which is causing a loss of pressure.Anthony Sorrento. 2,409 satisfied customers. I have a chevy cruze. 2014. 96300. Took my car for a tune. Took my car for a tune up, an engine oil and filter change, had a fuel system cleaning, had to replace my valve cover and gasket … read more. Jan 4, 2020 · Ricardowelch. I have a 2015 Chevy Cruze LS with a 1.8L Engine clocked in at 74k miles. Ever since the purchase, the P0011 check engine light code is always appearing even after repairs done to attempt to fix the issue. The repairs were replacements of the timing belt, water pump, camshaft actuators and the camshaft phaser. P0597 code definition. The P0597 trouble code signifies that a thermostat heater control circuit is open. What the P0597 code means. If a PCM (Powertrain Control Module) stores this code, it’s because the engine’s thermostat is experiencing an issue with the control voltage. The control circuit is most likely either open or short.2015 Chevy Cruze with a 1.4 L4 turbo. Sudden loss of power, Im sorry to hear about the issue with the car, but would be glad to try and help! Have seen a few issues that can cause P0299 code to set. Want to verify proper connections to boost sensor, as well as proper operation of the turbocharger. Attaching the test procedures for the code to ...The most common symptom of the P0597 code is an engine that overheats quickly. Other symptoms may include: -The engine overheating at idle. -The engine overheating at low speeds. -The engine temperature gauge reading higher than normal.Buy Engine Coolant Thermostat Housing with Sensor Gasket for 2011-2016 Chevrolet Cruze 2012-2017 Chevrolet Sonic 2013-2017 Chevrolet Trax Replaces 25192228: ... (Check Engine Light) with codes P0597 - P0599 or worse the engine is overheating then you may have a problem with your coolant themostat housing.

Engine is idling rough & seems to want to stall. CEL came on last Sunday. Ticking noise when running. I had the cruise control on today at 60mph, completely flat road & MPG indicator was erratic - bouncing from 20mpg to 45mpg to 30mpg to 80mpg, etc. AutoZone scan came back with P0171 & P0496. Took it to my usual GM dealer, they want $100 to ...

The P0597 trouble code signifies that a thermostat heater control circuit is open. What the P0597 code means If a PCM (Powertrain Control Module) stores this code, it’s because …The P0597 code can be extremely serious. A lack of temperature knowledge leaves your vehicle more prone to overheating or, on the other hand, using too much coolant fluid and power, thereby ... P0597 Thermostat Heater Control Circuit/Open Fault Code - MINI Cooper Forum - MINI2 Mini Cooper Forums. This may or may not be right for the Cruze but there was a recall for thermostats awhile back. Reply. Save. Jim Frye Premium Member · #3 · Oct 15, 2011. bigblacklt1z71 said: my check engine light came on and this is the code auto …Blasirl said: There are two actually PCV valves... P1101: MAF Out of Self Test Range. P1101 is one of the most common of the Chevy Cruze trouble codes. Whenever you start the vehicle, the mass airflow sensor does a self diagnostic. If the results of this test are out of range, than the P1101 trouble code is thrown.Warranty Claim Code is displayed on screen. Please discard all copies of bulletin 16186. Make Model Model Year From To RPO Description . Chevrolet Cruze 2013 2014 LWE 1.8L Engine Chevrolet Sonic Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system.Chevy Cruze Years To Avoid #3 – 2013. Engine oil leaks, electrical malfunctions, transmission failure, and coolant leaks were just a few of the problems that affected the Chevrolet Cruze models made in 2013. It is important to add that this model has garnered close to 1000 complaints related to reliability concerns.Have a 2012 Chevy Cruze and the other day the check engine light came on and thru the following codes: p0031, p0037, p0134, p0135, p0443, p0597, p0598, p0660, p2078. seem to be to many codes at one time to each individual issue?35 posts · Joined 2013. #1 · Jan 2, 2014 (Edited) The check engine light came on soon after starting one morning. Onstar diagnostic said it was a P0420 code and that the fault was not present anymore. They they stated that the light would go away after 7 engine starts (it didn't). I took to dealership.

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Apr 28, 2019 · To diagnose the P0597 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour. In today's video Mike and Drew talk about the common coolant leak failure on the 1.4 L turbo Ecotec engine from General Motors. These vehicles that use Dex-c...2011 Chevy Cruze 1.8 Manual So I start my car and it sounds like a helicopter as the fan is up to the max and after about 2 minutes of driving my check engine light comes on and I get P0030 , P0036 , P0134 , P0135 , P0140, P0141 , P0443, P0597, P0598 P0660, P2078 all at the same time. I got back to my house and scanned it, erased the codes and ...P0597 thermostat heater control circuit. Doesn't say open. Best way to test is with a bi directional scan tool and a lab scope. This is ground side switched pulse width modulated circuit. You need to verify with it disconnected key on that you have battery voltage to orange /black wire Then would have to do resistance testing on brown control ...A 20012 chevy cruze 1.4 turbo. I put a new ECU , both new temp sensors, and a new thermostat. The new thermostat (heater) is not working.wires have been checked for any brakes . ... I have a 2011 Chevrolet Cruise with a p0597 code. What does it …P0597 thermostat heater control circuit. Doesn't say open. Best way to test is with a bi directional scan tool and a lab scope. This is ground side switched pulse width modulated circuit. You need to verify with it disconnected key on that you have battery voltage to orange /black wire Then would have to do resistance testing on brown control ...I noticed that P0597 is code 2/6. Fully Built 1.4L (LUJ) ... discussions and the best community for owners to discuss all things related to the Chevy Cruze.My 2013 LS 1.8 cruze has codes P0597 (Thermostat Heater Control Circuit Open) and P0598 (. Thermostat Heater Control Circuit Low). I don't experience any issues besides this check engine light. The car drives as it should, with no water boiling problems, and no "AC off" warning. The car temperature goes to normal after 15-20min driving. ….

E8E10Sprocket#918776 Exhaust 918777 IntakeSolenoid#55567050Sensor#25195555VVT sprocket removal,https://youtu.be/Z-rcLxrRyvQVVT sprocket …Blasirl said: There are two actually PCV valves... P1101: MAF Out of Self Test Range. P1101 is one of the most common of the Chevy Cruze trouble codes. Whenever you start the vehicle, the mass airflow sensor does a self diagnostic. If the results of this test are out of range, than the P1101 trouble code is thrown.Labor: 1.0. To diagnose the P0598 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.Some common causes of code P0597 could include the following-. Damaged, burnt, shorted, disconnected, or corroded wiring and or connectors between the thermostat and the PCM. Failed or failing PCM. Note that this is a rare event, and the fault must therefore be sought elsewhere before any control module is replaced.There seems to be some variation on part location between the 2011 and 2013 Cruze models, while I am right in the middle. Here's the car specs: 2012 Chevy Cruze 2LS. Engine: 1.8L L4 DOHC 16V FFV. Part: ACDelco 213-4688 Engine Coolant Temperature Sensor. I'd post some pictures but I'm a new member, so, let me know if you need any more information!2011 Chevy Cruze 1.8 Manual So I start my car and it sounds like a helicopter as the fan is up to the max and after about 2 minutes of driving my check engine light comes on and I get P0030 , P0036 , P0134 , P0135 , P0140, P0141 , P0443, P0597, P0598 P0660, P2078 all at the same time. I got back to my house and scanned it, erased the codes and ...P0597 - I've a 2014 Chevrolet Cruz, and my P0597 is the problem that advance auto diagnosed . ... 2017 at 01:55 PM about the 2014 Chevrolet Cruze 1LT Sedan FWD. Dear readers, my Chevrolet dealer checked and repaired my 2012 Cruze LS (1.8L/Auto). (My problem was a 'check engine' indication, with accompanying radiator cooling fan running @ full, (even when starting from cold). They said it was a thermostat stuck open, and replaced said thermostat with a new one.Mar 1, 2023 · My 2013 LS 1.8 cruze has codes P0597 (Thermostat Heater Control Circuit Open) and P0598 (. Thermostat Heater Control Circuit Low). I don't experience any issues besides this check engine light. The car drives as it should, with no water boiling problems, and no "AC off" warning. The car temperature goes to normal after 15-20min driving. Bad thermostat or sensor , replacement P0597 code P0597 code chevy cruze, In today's video Mike and Drew talk about the common coolant leak failure on the 1.4 L turbo Ecotec engine from General Motors. These vehicles that use Dex-c..., 2013 Chevy Cruze 1.8 P2076 intake manifold tuning control valve position sensor performance. Quick video on it., How to Fix a P0597 or P0598 Thermostat Heater Circuit Code. How Tos Resources Articles Parts Support. Step by step instructions of how to diagnose and repair a GM 1.8L thermostat heater issue., Code P0599 is one of many trouble codes that can be logged and retrieved from the OBD system. Read on to understand what this code can mean for your vehicle. What Does the P0599 Code Mean? Diagnostic trouble code (DTC) P0599 stands for “Thermostat Heater Control Circuit High.” This code is logged when the powertrain control module (PCM ..., 2010-2016 (Gen1) Chevrolet Cruze technical bulletins, recalls, service updates, and service related issues. ... 2014 Cruze Eco with code U0101. saltmeetswound3; Apr 1 ..., This code is a generic trouble code that applies to all cars equipped with OBD-II system, especially those models made since 1996 up to present and with the same thermostatic control. It’s particularly common among German manufactured cars, such as Audi, BMW, Jaguar, Mercedes Benz, Mini, Opel, and Volkswagen., 2012 Cruze LT with the 1.4. I have had these codes (P0599 and P0597) and different times. March of 2020 I replaced the thermostat. No issues till April of 2021. Code P0597 at that time. Replaced the thermostat again. Light stayed off for two months. Then code P0599. I just replaced both temp..., 0:00 / 22:43 Chevy Cruze: Thermostat Heater Codes / TPMS Light On South Main Auto Repair LLC 810K subscribers Subscribe 8.9K 113K views 2 years ago 47 S MAIN ST In this video I have a look at..., A new heater has a resistance of approx 15.5 ohms., Feb 26, 2021 · Fixed fault code P0597 by replacing the thermostat and temperature sensor. Most people replace the entire thermostat unit, but I saved some time and cost by... , The intake manifold tuning valve (or intake manifold runner valve) is integral to the function of your intake manifold. The code P0660 may be logged if the PCM detects that there’s a mechanical or electrical fault in the intake manifold tuning valve located in bank #1. This usually refers to the side of the engine where cylinder #1 is located., 2013 Chevy Cruze 1.8 P2076 intake manifold tuning control valve position sensor performance. Quick video on it., P0597 code definition. The P0597 trouble code signifies that a thermostat heater control circuit is open. What the P0597 code means. If a PCM (Powertrain Control Module) stores this code, it’s because the engine’s thermostat is experiencing an issue with the control voltage. The control circuit is most likely either open or short. , My chevy cruze 2012 LS is showing p 2096(Post catalyst fuel trim system low limit) and p0597 (Engine coolant thermostat heater control circuit ) the vehicle perform as normal ,This was appeared when I had a coolant leakage problem and I replace one pipe. Please advise what are the possible reason for this issue.Thanks , Quick overview of the causes and fixes of a P00B7 engine error code on a Chevy Cruze.Read here for more information: https://www.backyardmechanic.org/causes-..., 10.12.2019 г. ... Surge tank level is a little low but that may be from the coolant filling in the gaps in the system from the original flush (done a few days ago) ..., In this video I show how to replace the thermostat and housing on a 2013 Chevy Sonic. This car had a code P0597 for the thermostat heater control circuit. Th..., Cruze Chevrolet P2096 and p0597 diagnostic trouble codes My 2012 Chevrolet Cruze LS is displaying the codes p 2096 (Post catalyst fuel trim system low limit) and p0597 (Engine coolant thermostat heating control circuit), yet the vehicle continues to operate normally. , Jan 15, 2021 · In today's video we take a look at a 2014 Chevrolet Cruze with a 1.4l 4 cylinder turbo engine. The vehicle has a check engine light illuminated and has codes... , Code P0597, as well as the related codes P0598 and P0599, refers to an electronically-controlled thermostat in the engine. Although these codes are generic and can be set by …, Jan 24, 2023 · Air intake leaks can also cause a P0420 code by letting excess air (running lean) into the exhaust and changing O2 sensor readings. In my case, there were 3 intake leaks: One where the intercooler pipe mates with the throttle body (loose hose clamp) and two where the intercooler pipes attach to the intercooler. 4. , CHEVROLET CRUZE SONIC CODE P0597 THERMOSTAT HEATER CONTROL CIRCUIT OPEN FIX CHEVY SONIC CRUZE In this video we will show you what causes code P0597 on Chevrolet Cruze or Chevy..., Engine is idling rough & seems to want to stall. CEL came on last Sunday. Ticking noise when running. I had the cruise control on today at 60mph, completely flat road & MPG indicator was erratic - bouncing from 20mpg to 45mpg to 30mpg to 80mpg, etc. AutoZone scan came back with P0171 & P0496. Took it to my usual GM dealer, they …, Sep 22, 2018 · P0299 and P0300. Was driving my 2014 Cruze today (82,000 miles) and when trying to merge onto an interstate, i noticed I had very very little power, took forever to reach highway speeds, i immediately thought something was up and started to turn around and come home. On a stoplight on the way home, i then noticed it started idling really really ... , Apr 28, 2019 · Labor: 1.0. To diagnose the P0598 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour. , Fixednut17 Discussion starter · #7 · Mar 5, 2021. Ma v e n said: The oil cap itself has nothing to do with that trouble code. There's a small possibility the thermostat wiring or connector was damaged during the valve cover replacement, but the most likely scenario is none of these are related and you just have thermostat system failure., Jul 27, 2021 · 2012 Cruze LT with the 1.4. I have had these codes (P0599 and P0597) and different times. March of 2020 I replaced the thermostat. No issues till April of 2021. Code P0597 at that time. Replaced the thermostat again. Light stayed off for two months. Then code P0599. I just replaced both temp... , Follow these steps to diagnose and fix P0597: Inspect the electrical thermostat connector. Remove any corrosion using baking soda and scraping. Replace the connector using electro grease and confirm a tight connection. Check the coolant level in the radiator. If it is low, the thermostat will overheat. If the coolant level is low, check for any ..., Check engine light for codes P0597-P0599; Low coolant level in coolant reservoir; Sweet smell while driving or parked; Evaporated coolant residue under hood; Gurgling sound on passenger side near heater core; Heat fluctuates between hot and cold; Puddles of coolant underneath the vehicle; Cracked or leaking thermostat housing, Engine is idling rough & seems to want to stall. CEL came on last Sunday. Ticking noise when running. I had the cruise control on today at 60mph, completely flat road & MPG indicator was erratic - bouncing from 20mpg to 45mpg to 30mpg to 80mpg, etc. AutoZone scan came back with P0171 & P0496. Took it to my usual GM dealer, they …, Feb 17, 2018 · Some common causes of code P0597 could include the following-. Damaged, burnt, shorted, disconnected, or corroded wiring and or connectors between the thermostat and the PCM. Failed or failing PCM. Note that this is a rare event, and the fault must therefore be sought elsewhere before any control module is replaced. , Dec 25, 2013 · 4 posts · Joined 2013. #1 · Dec 25, 2013. I am new to this forum but have a 2012 1.8L cruze with 75K on it. when you start it the CEL (check engine light) comes on and shows anywhere from 7-11 codes including P0031,P0037,P0443,P0480,P0597,P0598,P0628,P0660 AND P2078....A cruise control code is present too but the car doesn't even have cruise ... , In your case, the P0420 code stands for “Catalyst System Efficiency Below Threshold (Bank 1).”. When you receive aP0420 code it means your catalytic converter is not operating at maximum efficiency. Usually this means your catalytic converter needs to be replaced or there is a problem with your O2 (oxygen) sensors.