P0446 cadillac escalade

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P0446 cadillac escalade. Jan 26, 2017 · This is enough to fire the spark plugs. The PCM sets an ignition coil control circuit code P0351-P0358 when it detects a problem with the ignition coil circuit. The last digit of these codes references the cylinder where the issue is occurring. For example, P0351 indicates a fault in the #1 cylinder coil circuit.

Oct 20, 2018 · P0446 Cadillac Escalade. asked Jan 20, 2018 by Keith Blakely. po466; code; 0 votes. 0 answers 159 views. How to check FTP. asked Jan 11, 2017 by Morris. po466; solenoid; vapor; To see more, click for the full list of questions or popular tags. 37.2k questions 31.7k answers 1.3k comments 22.5k users Need A Repair Shop?

DTC P0446 DTC P0446 System Description This DTC tests the evaporative emission (EVAP) system for a restricted or blocked EVAP vent path. The control module commands the EVAP canister purge solenoid Open and the EVAP canister vent solenoid Closed. This allows vacuum to be applied to the EVAP system.Conclusion. If your Cadillac Escalade has the P0442 OBD II code, you should first check the fuel cap. If it’s missing or broken, replace it. If the fuel cap seems ok, you must check the EVAP system for a leak. One of the most common issues that happens with the Cadillac Escalade is the P0442 trouble code. This code appears when connecting the ...If you’re in the market for a luxury SUV, the Cadillac Escalade is likely on your list of options. However, with a starting price of over $76,000, it’s important to find ways to save money and get the best deal possible.Subject: LR4, LM4, LM7, L59, LQ9, LQ4, L18 DTC P0446 (Restricted/Blocked EVAP Vent Path) Set, Service Engine Soon (SES) Lamp Illuminated (Replace Vent Solenoid and Bracket) Models: 2000–2003 Cadillac Escalade 2002–2003 Cadillac Escalade EXT 2003 Cadillac Escalade ESV 2000–2003 Chevrolet Suburban, Tahoe 2002–2003 Chevrolet AvalancheSep 7, 2018 · FIXED P0449 CADILLAC CTS CTS-V

#StageOnBrasil, Curitiba/PRGostou da banda Cadillac'n'Roll, e quer tê-los fazendo um som em seu evento? Peça um orçamento agora mesmo sem compromisso ;)https...OBD2 Code P0443 Cadillac definition: The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter the engine to be burned, rather than vented into the atmosphere as an emission. The purge valve solenoid is supplied switched battery voltage. The ECM controls the valve by operating the ground circuit, opening the purge valve at ... How to repair P0446 Cadillac code Evaporative Emission Vent System Performance This Diagnostic Trouble Code (DTC) tests the Evaporative Emission (EVAP) system for a …Sep 18, 2023 · The downstream (post-converter) HO2S primarily gets used for post catalyst monitoring. It does this by checking the oxygen content of the exhaust gas after exiting the catalytic converter. How to Diagnose the P0036 Code. To resolve the P0036 code, you need to pinpoint its exact cause first, but this can be a bit difficult.Escalade ESV AWD V8-6.2L (2007) > Cadillac Workshop Service and Repair Manuals > Powertrain Management | Emission Control Systems | Evaporative Emissions System | Evaporative Canister Filter | Component Information | Technical Service Bulletins | All Technical Service Bulletins for Evaporative Canister Filter: | 09-06-04-028C | Apr | 11 ...Sep 11, 2023 · The 2011 Cadillac SRX's turning circle is 40.3 ft.. What is the turning circle of the 2004 Cadillac Escalade? The 2004 Cadillac Escalade's turning circle is 39.5 ft..An "over reporting" Mass Air Flow Sensor can be a common cause of a code P0172 and P0175. Essentially, this means that the Air Flow Sensor is telling the computer that much more air is entering the engine than actually is. Based on this large amount of air entering the engine, the engine computer or PCM sprays more fuel into the combustion ...Oct 24, 2016 · Let's have a look at this Chevrolet Cobalt that came with a code P0446 for the EVAP Vent Solenoid Performance. I have notice that most people will get sucked...

Sep 13, 2023 · The P0430 code stands for “Catalyst System Efficiency Below Threshold (Bank 2).” This trouble code is triggered when the computer detects a problem with the catalytic converter mounted near engine bank 2. A faulty catalytic converter, damaged O2 sensor, wiring issues, and exhaust leaks are the most common reasons why the on …I have a P0446 Code on my 2002 Cadilac Deville. I have replaced the Purge Solenoid Valve and the Canister Solenoid Valve. I checked for any kinked or bad lines or connections. Reset the MIL and it returns to P0446 code after 4 or 5 days. I know 2002 Cadilac was recalled for defective Fuel Tank Pressure Sensor years ago so, I was thinking of ...Escalade ESV AWD V8-6.2L (2007) > Cadillac Workshop Service and Repair Manuals > Powertrain Management | Emission Control Systems | Evaporative Emissions System | Evaporative Canister Filter | Component Information | Technical Service Bulletins | All Technical Service Bulletins for Evaporative Canister Filter: | 09-06-04-028C | Apr | 11 ...Sep 2, 2015 · Do you have a General Motors vehicle such as a Cadillac Escalade or Chevrolet Avalanche and are experiencing a hard to fill fuel tank condition where the gas... The P0455 diagnostic trouble code appears when there’s a leak in the Evaporative Emission Control (EVAP) system, and the system can’t maintain pressure. The EVAP system usually consists of ...

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Mar 20, 2018 · 05 escalade p0455. I purchased a clone tech 2 to help troubleshoot this code and just ti have on hand. P0455 is evap large leak. Hooked up the scanner but the leak was to large for the system to run the test so I tried opening and closing the vent valve and the purge valve, I noticed I couldnt close the vent valve. The following TSBs of Cadillac are related to DTC P0446. 2000 Cadillac Escalade Engine and Engine Cooling TSB Details … 2001 Cadillac Escalade Engine and Engine Cooling TSB Details … 2002 Cadillac Escalade Engine and Engine Cooling TSB Details … 2003 Cadillac CTS Fuel System TSB Details …I have a 2002 Cadillac Escalade 6.0 with a code of p0446. What can I do about this myself. The code reads evaporative - Answered by a verified Auto MechanicThe P0420 code signals a low catalyst system efficiency. This code suggests that the oxygen levels are below the desired threshold (Bank 1), which most often results from problems with your car ...2024 CADILLAC ESCALADE-V

Jun 14, 2011 · 2007 cadillac escalade ext has a check engine lite on and computer code p0449 . what is the best way to go about finding and the location of the problem and making the repairs ? … read more Ron Z. OBD-II Code P0446 is defined as a Evaporative System Vent Control Circuit Malfunction. The evaporative control (EVAP) system captures any raw fuel evaporating from the fuel storage system (e.g. the fuel tank, filler neck, and fuel cap). Under precise operating conditions—dictated by engine temperature, speed, and load—the EVAP system stores ...Dec 29, 2021 · Hi guys, welcome to "Valley Mobile Automotive". This video is about chevy Silverado EVAP p0446 diagnosis and fix. If your check engine light is on with a P04...Sep 17, 2021 · In modern cars, the purge valve is an electrically-operated solenoid, that is controlled by the engine computer. When the engine is off, the purge valve is closed. When the engine is running and fully warmed up, the engine computer pulses the purge valve open allowing some amount of fuel vapors to be purged from the charcoal canister and …Sep 18, 2023 · The downstream (post-converter) HO2S primarily gets used for post catalyst monitoring. It does this by checking the oxygen content of the exhaust gas after exiting the catalytic converter. How to Diagnose the P0036 Code. To resolve the P0036 code, you need to pinpoint its exact cause first, but this can be a bit difficult.The P0573 Cruise Control/Brake Switch A Circuit High and related codes ( P0571 and P0572) are set when the ECM (engine control module) detects a malfunction within the cruise control/brake switch "A" circuit. In this case it means there is a detected high electrical condition within the circuit. Example of a brake switch and it's location:2000 - 2006 Tahoe/Yukon/Escalade Models. Engine & Drivetrain . p0446 + p1441. Thread starter Z28TWITCH; Start date ... . p0446 + p1441. Thread starter Z28TWITCH; Start date Sep 18, 2013; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a ...Cadillac Escalade ESV had auto zone check the code p0446 had auto zone check the code p0446 haveing problems filling the truck with fule pump keeps kicking off auto zone said it could be four thing need help narrowing it down 1 pureor vent solenoids defecti …December 29, 2018 by Jason One of the most common trouble codes with the Cadillac Escalade is the P0496 code. This code number references a number that is given to you when you plug your Escalade into an OBDII scanner. Below, you'll find the most common symptoms and ways to diagnose the P0496 in your Cadillac Escalade. Good Luck!What does this mean? OBD2 Code P0446 Cadillac definition: Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it).Maybe this will help you out.-----#09205: Special Coverage Adjustment - Evaporative Emission Canister Purge Solenoid Valve Warranty - (Mar 11, 2010) Subject: 09205 – Special Coverage Adjustment – Evaporative Emission Canister Purge Solenoid Valve Warranty Models: 2006 Cadillac CTS Equipped with 3.6L V6 Engine (LY7) or 2.8L V6 Engine (LP1 ...

OBD2 Code P0443 Cadillac definition: The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter the engine to be burned, rather than vented into the atmosphere as an emission. The purge valve solenoid is supplied switched battery voltage. The ECM controls the valve by operating the ground circuit, opening the purge valve at ...

Dec 25, 2018 · A prevalent issue with the Cadillac ATS is the P0446 code. This code corresponds to a specific number obtained when connecting your ATS to an OBDII scanner. A faulty vent control valve most commonly causes P0446. Table of Contents Definition Symptoms Causes Diagnosis How to Fix P0446 Definition P0446 is a standard OBDII …DTC P0446 DTC P0446 System Description This DTC tests the evaporative emission (EVAP) system for a restricted or blocked EVAP vent path. The control module commands the EVAP canister purge solenoid Open and the EVAP canister vent solenoid Closed. This allows vacuum to be applied to the EVAP system.Oct 2, 2023 · P0341 is a diagnostic trouble code (DTC) for "Camshaft Position Sensor Circuit Range/Performance". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light …2023 Cadillac Escalade V review by The Straight Pipes. The Escalade V is putting down 682 horsepower and 653 lb-ft of torque from a 6.2L Supercharged V8. At ...November was an exceptionally strong month for auto sales—especially for trucks and SUVs of all shapes, sizes, and degrees of luxury. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its partners. I agree t...Chevy Mechanic: The p0446 is a restriction detected in the evaporative emission system.This is usually a plugged fuel tank vent solenoid.This solenoid will get plugged with dirt and mud.Here is a technical service bulletin for that code. LR4, LM4, LM7, L59, LQ9, LQ4, L18 DTC P0446 (Restricted/Blocked EVAP Vent Path) Set, Service Engine Soon ...The least-expensive 2022 Cadillac Escalade is the 2022 Cadillac Escalade Luxury 4dr SUV (6.2L 8cyl 10A). Including destination charge, it arrives with a Manufacturer's Suggested Retail Price (MSRP ...FIX CODE P2228 BAROMETRIC PRESSURE SENSOR CHEVY, CHEVROLET, BUICK, GMC, CADILLAC Great Car Scanner: https://amzn.to/2QmNBri Check out our Amazon Store for ...Apr 14, 2023 · To diagnose the P2635 GMC 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.

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Jan 31, 2019 · Please help. We have a 2007 Chevy Colorado and we have codes P0443, P0455, P0446, and P0128. We are thinking about replacing thermostat, purge control circuit, and vent control circuit per the codes. But- we do not know where the purge control valve circuit and vent control circuit are located on the engine.The Cadillac Escalade is one of the most luxurious and iconic SUVs on the market today. It has been a staple of luxury car culture for decades, and its popularity continues to grow. But how much does it cost to buy a new Cadillac Escalade? ...Gas Cap, Fuel Tank Cap Replace GT231, 15763227 Compatible with Chevy GMC Cadillac Oldsmobile Pontiac - 1999-2003 Silverado Sierra, 2000-2003 Suburban Tahoe Yukon, 2002-2003 Escalade Avalanche, More $12.99 $ 12 . 99What does this mean? What are the Possible Causes of the DTC P0446 Cadillac? NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. Plugged vapor canister Pinched or blocked EVAP hose Faulty Evaporative Emission Vent Solenoid ValveWhat Does the P0446 Code Mean? Code P0446, otherwise known as Evaporative Emission Control System (EVAP) Vent Control Circuit Malfunction, indicates that your car’s computer has detected (or believes it has detected) a problem with the function of the EVAP system vent valve.Trouble code P0446 stands for an Evaporative Emission Control System (EVAP) Vent Control Circuit Malfunction. This code means that the car’s computer detected trouble with the EVAP system vent …P0446 Causes. Missing, defective, damaged, or loose gas cap (most common) Defective EVAP Canister Vent Control Valve. Distorted, damaged or cracked Fuel Tank Filler Neck. Torn or punctured Evaporative system hose (s) Defective Fuel Tank Sending Unit gasket or seal. Split or damaged Carbon Canister.Apr 1, 2020 · Shop for New Auto Parts at 1AAuto.com http://1aau.to/c/240/A/evap-emission-control-system-partsEVAP Explained! It's one of the most common OBDII trouble code...Subject: Malfunction Indicator Lamp (MIL) Illuminated, DTCs P0442, P0446, P0455 or P0449 Set - Fuel Tank Hard to Fill - Moisture, Water, Corrosion at Evaporative Emissions (EVAP) Canister Vent Solenoid (CVS) Valve (Install Revised EVAP CVS Valve Assembly and Jumper Harness)Save. glake89 · #3 · May 28, 2013. From the SM-. "This DTC tests the evaporative emission (EVAP) system for a restricted or blocked EVAP vent path. The control module commands the EVAP canister purge solenoid Open and the EVAP canister vent solenoid Closed. This allows vacuum to be applied to the EVAP system. ….

In this video I have a look at a 2003 Chevrolet Suburban that came in with the SES light on with a code for the EVAP system. P0446 was the code stored in it....Jul 3, 2023 · Web in this video i will be replacing the fuel evap purge valve solenoid on a 2008 cadillac escalade. Web p0446 is a diagnostic trouble code (dtc) associated with a vehicle’s evaporative emissions control system. Includes filter, flange, housing & valve; Have A 2004 Cadillac Cts 3.6 Have A 2004.Applications: For 04-07 GMC Sierra Yukon Savana, 04-09 Chevrolet Chevy Silverado Suburban Tahoe Avalanche Equinox Express Malibu Uplander, 04-09 Cadillac Escalade DeVille ESV EXT SRX STS Seville XLR | Buick Allure LaCrosse Terraza, 05 Hummer H2, 04-09 Pontiac Bonneville G6 Grand Prix Montana Torrent, Saturn Relay WITH 3.4L 3.8L …Chevy Mechanic: The p0446 is a restriction detected in the evaporative emission system.This is usually a plugged fuel tank vent solenoid.This solenoid will get plugged with dirt and mud.Here is a technical service bulletin for that code. LR4, LM4, LM7, L59, LQ9, LQ4, L18 DTC P0446 (Restricted/Blocked EVAP Vent Path) Set, Service Engine Soon ...Title: #09-06-04-028D - MIL Illuminated, DTCs P0442, P0446, P0455 or P0449 Set - Fuel Tank Hard to Fill - Moisture, Water, Corrosion at EVAP CVS Valve - (Apr 22, 2014) Vehicle: 2007 Cadillac Escalade - AWD The document preview is shown on the right. To view the entire document you need to have a subscription. Subscribe 2007 cadillac escalade ext has a check engine lite on and computer code p0449 . what is the best way to go about finding and the location of the problem and making the repairs ? … read more Ron Z.19 ene 2012 ... An intermittent condition could be caused by a damaged EVAP vent housing, a temporary blockage at the EVAP vent solenoid inlet, or a pinched ...Subject: MIL Illuminated, DTC P0442, P0446, P0455 or P0449 Set– Fuel Tank Hard to Fill – Moisture, Water, Corrosion at EVAP CVS Valve Models: 2007-2010 Cadillac Escalade Models 2007-2010 Chevrolet Avalanche, Suburban 1500, Tahoe 2007-2010 GMC Yukon Models, Yukon XL 1500 Models Dec 16, 2020 · Upcoming Cadillac Optiq To Get Curved Display PanelOctober 24, 2023 2019 GMC Savana Recalled For Diesel Particulate Matter Sensor Issue October 24, 2023 Here’s Why GM Made This Key Change To The ... P0446 cadillac escalade, 2004 Cadillac CTS P0446 My 2004 CTS has a check engine light on reading P0446. is it safe to keep driving with this code on?... Nissan Code P0446 & P0440 I have a 1997 …, Sep 20, 2017 · 2004 Denali 6.0L throwing Codes P0174, P0171, P0101, P0446. Thread starter Marinevet; ... 2006 Tahoe/Yukon/Escalade Models. Engine & Drivetrain. Tahoe Yukon Forum , I replaced these parts, However, I did not blow out the lines. Disconnect the Purge Solenoid from under the hood, under the plastic cover on the top. It has ..., P0446 Causes. Missing, defective, damaged, or loose gas cap (most common) Defective EVAP Canister Vent Control Valve. Distorted, damaged or cracked Fuel Tank Filler Neck. Torn or punctured Evaporative system hose (s) Defective Fuel Tank Sending Unit gasket or seal. Split or damaged Carbon Canister., Sep 7, 2018 · FIXED P0449 CADILLAC CTS CTS-V, Sep 30, 2023 · Cập nhật thông tin và bảng giá xe Cadillac tháng 10/2023 mới nhất. Các mẫu xe gồm: Cadillac Escalade, Cadillac XT6, Cadillac XT5, Cadillac XT4, Cadillac CT6, Cadillac CT5, Cadillac CT5 V-Blackwing, Cadillac CT4,Cadillac CT4 V-Blackwing, Cadillac XTS, CT, A logged P0463 code means that a high voltage signal is detected from the fuel level sensor, resulting in inaccurate fuel gauge readings. A faulty fuel level sensor circuit or sending unit, damaged body computer, PCM issues, and a faulty smart fuse box are common reasons why this code is triggered., Cadillac Store - Curitiba, Curitiba, Brazil. 5,025 likes · 45 were here. Casa do Lava-car agora é Cadillac Store. Encontre os melhores produtos e equipamentos para embeleza, 2006 Cadillac escalade Codes coming up are: P0446 EVAP Vent Solenoid Valve Control System P0452 Fuel Tank Pressure Sensor Circuit Low Voltage P0455 Evaporative Emission (EVAP) System Leak Detected The fuel pump was replaced about 2 months ago., How to repair P0446 Cadillac code Evaporative Emission Vent System Performance This Diagnostic Trouble Code (DTC) tests the Evaporative Emission (EVAP) system for a …, P0446 is a diagnostic trouble code (DTC) associated with a vehicle’s evaporative emissions control system. It signifies an issue in the vent control circuit in your Cadillac Escalade’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Cadillac Escalade is the P0446 code., CEL code P0440, P0441, P0442, P0446 explanation and common fix.Join our Facebook Group! https://www.facebook.com/groups/wrenchsense/Good EVAP leak tester: ht..., P0446 - evap vent solenoid valve control system. ... Enjoy banner ad-free browsing with Cadillac Owners Forum Plus. Learn more. Cadillac Owners Forum. Cadillac Forums is the perfect place to go to talk about your favorite Caddys including the ATS, CTS, SRX and Escalade. Full Forum Listing., Jan 26, 2017 · If the ECM attempts to activate the vent control solenoid but detects incorrect voltage feedback or incorrect vacuum or pressure feedback, it will lock out EVAP function, set a diagnostic trouble code (DTC), and illuminate the malfunction indicator lamp (MIL). DTC P0446 is defined as “Evaporative Emission (EVAP) Vent Control Circuit ..., The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test., Resetting service engine soon light in my 2002 cadillac escalade. Turn the ignition key to the RUN position. Press the INFO button on the Driver Information Center (DIC) button to display ENGINE OIL LIFE. Fully push and release the accelerator pedal 3 times within 5 seconds., 2006 Cadillac DTS check engine light P0446. Stay on I bought the fuel pressure sensor but wondering if it’s the purge - Answered by a verified Cadillac Mechanic. ... I'm getting a PO446 code on my 2008 Escalade and I can't seem to figure out why., 2000 - 2006 Tahoe/Yukon/Escalade Models. Engine & Drivetrain . 2004 Denali 6.0L throwing Codes P0174, P0171 ... P0171, P0101, P0446. Thread starter Marinevet; Start date Sep 20, 2017; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code., Apr 10, 2023 · Top-tier luxury with 682 horsepower, Super Cruise, and air ride adaptive suspension... what more do you want?!» Subscribe: http://bit.ly/JLGSubscribe» Visit ..., Jun 16, 2018 · 2007 cadillac escalade ext has a check engine lite on and computer code p0449 . what is the best way to go about finding and the location of the problem and making the repairs ? … read more Ron Z. , What Does the Code P0446 Mean? When a diagnostic scan of an automotive computer outputs the trouble code P0446, it is important to understand the meaning of the letter and numbers in this alphanumeric string. The letter P indicates a generic powertrain code, while the number 0446 points more specifically toward a malfunctioning vent control circuit […], DTC P0446 DTC P0446 System Description This DTC tests the evaporative emission (EVAP) system for a restricted or blocked EVAP vent path. The control module commands the EVAP canister purge solenoid Open and the EVAP canister vent solenoid Closed. This allows vacuum to be applied to the EVAP system., Sep 15, 2023 · Aside from your vehicle’s main computer or powertrain control module (PCM), there are other modules in your vehicle that control specific components and functions. These modules use input from various sensors and coordinate with each other to control a variety of outputs. The P069E code indicates that the module responsible for …, First: They'll need to scan your vehicle to verify the P0446 code is the only one present to get started. If other codes indicate fuel pressure or fuel system issues, you should take care of ..., DTC P0496 essentially means that a vehicle’s evaporative emissions (EVAP) system is experiencing a problem with purge flow. There are numerous ways in which a vehicle’s EVAP system can ..., Trouble code P0446 stands for an Evaporative Emission Control System (EVAP) Vent Control Circuit Malfunction. This code means that the car’s computer detected trouble with the EVAP system vent …, Mar 31, 2021 · Cadillac Escalade ESV had auto zone check the code p0446 had auto zone check the code p0446 haveing problems filling the truck with fule pump keeps kicking off auto zone said it could be four thing need help narrowing it down 1 pureor vent solenoids defecti … , May 2, 2011 · Chevy Mechanic: The p0446 is a restriction detected in the evaporative emission system.This is usually a plugged fuel tank vent solenoid.This solenoid will get plugged with dirt and mud.Here is a technical service bulletin for that code. LR4, LM4, LM7, L59, LQ9, LQ4, L18 DTC P0446 (Restricted/Blocked EVAP Vent Path) Set, Service Engine Soon ... , 2006 Cadillac DTS 4.6L Diagnosing a simple GM EVAP System with Scantool.Music created by: "The LuffLife", P 0446 has to do with the canister and tank vent system, not the EVAP solenoid. Purge valve/solenoid = at throttlebody. Tank vent solenoid = in line between charcoal canister and fuel tank. FTP (Fuel Tank Pressure) sensor = in the top of the fuel pump assembly (under trunk floor hatch) See more. Reply., Warning: preg_match_all(): Unknown modifier '/' in /srv/users/serverpilot/apps/otosection/public/wp-content/plugins/SupperIMG/functions.php on line 243 Warning: preg ..., C. CadiKing2006 Discussion starter · Dec 22, 2005. HEy all, my check engine light turned on so i called ONSTAR and did the diagnosis. They said that my car gave back 2 codes: P0128 - Coolant Thermostat Below Thermostat Regulating Temperature. P0446 - Evaporative emissions. They also mentioned that i might or might …, Yeah, I'd go with that. There may be some differences as to how the purge solenoid is designed as to stay on longer to clear the longer EVAP lines of the longer wheelbase pick-ups and software calibration differences to account for that (I really don't see that as being a huge problem as the difference is so minute) but I'd go ahead and go as per the TSB for the Yukon s you are and that should ...