Traditional gasoline car fault
Search fault code and browse forum case posts.
This page is designed for quick diagnosis on gasoline vehicles by combining code lookup with real discussion cases. Enter a fault code to filter related topics, then compare symptom context such as cold start behavior, acceleration load, fuel-trim deviation, ignition misfire pattern, and recent maintenance history. Many codes can be triggered by shared root causes, so use cross-checks from multiple posts before replacing sensors, coils, injectors, or catalytic components.
2002 Audi A6 P0421 and P0352 Fault Codes: Engine Shaking Until Oil Temperature Stabilizes
My 2002 Audi A6 is experiencing noticeable shaking or vibration when under load, which only stops once the engine oil temperature reaches its operating range. The vehicle has tr...
2002 Audi A6 | P0352P0340 Fault on 2002 Jeep 2.7L Laredo: Limp Mode After Cold Starts Below 8°C
Hi everyone, I'm experiencing a recurring issue with my 2002 Jeep 2.7L Laredo (WG model). After starting the vehicle in cold mornings—below 8°C—the car enters limp mode after ap...
Jeep 2.7 WG 2002 | P03402004 mercury monterey p0174 bank two running too lean
I have an 04 mercury monterey with the cel on giving the codes p0174 (bank two running too lean) however I can't figure out what is causing this! First I cleaned the maf air flo...
2004 mercury monterey | P01742003 Chevy S10 4.3L Engine Misfire & P0172 Code: Injector Not Working Despite Power
I recently replaced the fuel injector assembly (spider) in my 2003 Chevrolet S10 4.3L V6, but the engine still isn't firing properly in cylinder #1. The vehicle shows a P0172 co...
2003 Chevy S10 | P01722005 Nissan Altima 2.5L P1273 Fault: O2 Sensor Replacement Causes Code, TID $43 Value Exceeds Max
Hello, I recently replaced the pre-cat and oxygen (O2) sensors on my 2005 Nissan Altima 2.5L, but after the replacement, the vehicle started triggering fault code P1273. I clea...
2005 Nissan Altima | P12732000 Ford Focus P0303 P0304 P0171 P0172 P1132 - Engine Stalls, Loses Power on Warm Days
2000 Ford Focus 2.0L MFI DOHC 4-cylinder, 184,000 miles My 2000 Ford Focus is experiencing intermittent power loss and stalling, especially on warm days (air temperature above ...
2000 Ford Focus | P01712001 Chevy Cavalier O2 Sensor Not Ready: Smog Failure Fix and OBD2 Code Resolution
I own a 2001 Chevrolet Cavalier that failed its smog inspection. I have already replaced both the upstream and downstream oxygen sensors, but my OBD2 system still shows 'O2 sens...
2001 Chevy Cavalier | P01352000 Chevrolet Blazer P1345 Code: CKP-CMP Sensor Correlation Issue After Replacement
I'm experiencing a return of the P1345 diagnostic trouble code on my 2000 Chevrolet Blazer, even after replacing the sensor in December. The vehicle has a stock 4.3L engine with...
2000 chevrolet blazer | P1345GMC Acadia 2009 P0300 Misfire: Hesitation Between 80-100km/h at Less Than 2000 RPM
My 2009 GMC Acadia hesitates between 80 and 100 km/h on the highway, occurring only below 2000 RPM. The issue does not occur above this speed. The OBD-II diagnostic code display...
GMC Acadia | P03002008 Toyota Corolla Code P0420: Catalytic Converter Performance Below Threshold?
My 2008 Toyota Corolla has triggered a P0420 diagnostic code, indicating catalytic converter performance is below the minimum threshold. According to the sensor specifications, ...
Getz | P04202001 Chrysler 300M Transmission Codes P0731, P0732, P0733, P0740, P1782: Can a Pressure Solenoid Fix Gear Ratio Errors?
Hello everyone, My name is Mike, and I own a 2001 Chrysler 300M that has recently triggered multiple transmission error codes: P0731, P0732, P0733, P0740, and P1785. The P0731,...
2001 Chrysler 300M | P07312006 Cadillac SRX P0174 Code: What Does It Mean? Causes & Fixes Without Expensive Repairs
I recently had my oil changed at a service center for my 2006 Cadillac SRX, and unfortunately the technician forgot to replace the oil filler cap. Before I got home, my engine l...
2006 Cadillac SRX | P01742008 Hyundai Santa Fe 3.3L Frequently Throws P0011, P0012, P0026, and P0300 Codes - Diagnosis & Solutions
My 2008 Hyundai Santa Fe with a 3.3L engine has recently triggered multiple diagnostic trouble codes: P0011, P0012, P0026, P0300, P0302, and P0306. I've already performed the re...
2008 Hyundai Santa Fe | P00112003 Porsche 996 P0420 OBD2 Code at 15,000 Miles - Common Causes and Fixes
I own a 2003 Porsche 996 and recently received a P042-0 diagnostic code indicating a catalytic converter efficiency issue. This occurred after only 15,000 miles of driving. Is t...
2003 996 Porsche | P0420P0740 Fault in 2004 Jeep Grand Cherokee 4X4 with 545RFE Transmission - No Overdrive and CEL Activation
Hello, I'm new to this forum and seeking help with a recurring issue on my 2004 Jeep Grand Cherokee 4X4 (4.7L H/O engine, 545RFE transmission). The vehicle will not shift into ...
2004 Grand Cherokee | P07402010 Chevrolet Impala 3.5L Engine P02440 to P0411: What Could Be Missing After Check Valve Replacement?
I recently had a P02440 diagnostic code on my 2010 Chevrolet Impala with a 3.5L engine. I replaced the exhaust gas recirculation (EGR) check valve as recommended, but now the ve...
2010 Chevy Impala | P04112004 Nissan Xterra P0171 - System Running Too Lean Bank 1: Diagnosis and Fixes
My 2004 Nissan Xterra is exhibiting difficulty accelerating and failing to shift into higher gears. While I suspect it's not a transmission issue, I'd like to know what diagnost...
2004 Nissan Xterra | P01711996 Buick Century Custom - P0300 and P0441 Codes: Causes, Fixes, and Safety Concerns
I recently purchased a 1996 Buick Century Custom from a friend. He mentioned that the car occasionally fails to start on initial attempts, but it always starts eventually. Last ...
1996 Buick Century Custom | P0300Error Codes P0620 and P1000 in 2007 Ford F-150 5.4L Flex Fuel: Charging System Diagnosis and Fixes
I own a 2007 Ford F-150 XLT with a 5.4L flex fuel engine, and I've been experiencing persistent error codes P0620 and P1000 for approximately three weeks. The issue began when I...
2007 Ford F-150 | P0620Practical workflow for fault-code troubleshooting
Start by confirming battery voltage and reading freeze-frame data, then inspect wiring and connectors before replacing parts. If the code returns after clearing, record the exact driving or idling condition when it reappears. Prefer case threads with complete repair feedback, because confirmed outcomes provide stronger guidance than one-time symptom descriptions. Following a step-by-step workflow reduces repeated repairs and lowers total diagnosis time.