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.
P0171 to p0172 2003 trailblazer 4x4 6 cyl
P0171 is showing on scanner but not a service light on , then after about 30 miles p0172 go's active and turns service engine light on . Seems like it's running fine ,but cannot...
2003 Trailblazer 4x4 6 cyl | P01712005 Nissan Murano 3.5L DOHC: PO110 and P0420 Codes, Rough Idle, Power Loss and Backfiring After Fix - Diagnosis and Solution
I have a 2005 Nissan Murano with a 3.5L DOHC engine that came in with diagnostic codes PO110 and P0420, along with a noticeable rough idle. While driving, I observed intermitten...
2005 Nissan Murano 3.5 Dohc | P04202000 Chevrolet Silverado 4.3L V6: P0171 and P0174 Lean Codes, Stumbling After Acceleration, Fuel Pressure & MAF Diagnosis
Hi everyone, I'm a new member of this forum and have been troubleshooting a persistent issue on my 2000 Chevrolet Silverado 1500 with the 4.3L V6 engine (190,000 miles). The tr...
chevy silverado | P0171PO400 Fault Diagnosis for 2000 Nissan Frontier 2.4L - EGR-Related Solutions
My hand-held Actron scanner is detecting code PO400 on my 2000 Nissan Frontier 2.4L, but it lists over ten potential fixes—ranging from vacuum line cleaning to EGR cleaning or P...
Nissan Frontier | P04002006 Jeep Liberty P0171 DTC: Both Banks Lean - Vacuum Leak or MAF Issue?
Hello, My 2006 Jeep Liberty has recently triggered a P0171 diagnostic trouble code (DTC), indicating both Bank 1 and Bank 2 are running lean. The vehicle ran smoothly until yes...
Jeep Liberty | P0171Nissan Frontier P0340 Code: Cam Sensor Open Circuit or Wiring Short? (2004 VG33ER SVE with Supercharger)
Hello everyone! I own a 2004 Nissan Frontier VG33ER with supercharged SVE configuration, currently at around 70,000 miles. The truck has consistently delivered strong power and ...
nissan | P03402005 Chevrolet Silverado P0332 Knock Sensor Issue: Diagnosis and Fix Guide
Hi everyone, I'm new to this forum and didn't see the right section for posting — apologies if this is a duplicate. I currently have a 2005 Chevrolet Silverado 4WD with a P0332 ...
2005 Silverado | P0332DTC codes 2004 Chevy Avalanche - P0300 P0449 P0330
Hi! I'm ready to trade this old friend if I can't sort this out. I've got a 2004 Chevy Avalanche 1500 4X4 5.3l V8. It's been mis-firing consistently on Cyls 2, and 7. Throwi...
2004 Chevy Avalanche | P03002004 GMC Safari with OBD-II Codes P0455 and P0449: Diagnosis and Fixes
My 2004 GMC Safari has been displaying OBD-II trouble codes P0455 and P0449. I took it to a Pep Boys shop, where they suggested one of three potential causes: the gas canister p...
2004 GMC Safari | P04492001 Ford E250 5.4L P0171 & P0174 Codes: Vacuum Leak Diagnosis and MAF Sensor Replacement Help
I own a 2001 Ford E250 van with a 5.4L V8 engine and am currently experiencing OBD2 diagnostic codes P0171 (System Too Lean Bank 1) and P0174 (System Too Lean Bank 2). I've alre...
01 e250 | P01712002 BMW 530i P1343 and P1350 Fault: Cylinder 1 and 5 Ignition Issues at 200k Miles
My 2002 BMW 530i, with 200,000 miles on the odometer, has recently started displaying fault codes P1343 and P1350. These codes indicate malfunction in cylinders 1 and 5, suggest...
2002 BMW 530 I | P13431997 Isuzu Hombre P0300 Random Misfire Code: Diagnosis and Solutions
I've been experiencing a persistent P0300 random misfire code on my 1997 Isuzu Hombre, which has approximately 130,000 miles. Despite replacing multiple components—including spa...
1997 Isuzu Hombre | P03002000 GMC Truck DTC P1416: Secondary Air Injection System Fault - How to Diagnose and Fix
My 2000 GMC truck is showing a DTC P1416 emission control code on the OBD-II scanner. The code indicates a fault in the Secondary Air Injection (AIR) System for Bank 2, which is...
2000 GMC | P1416P0455 Diagnostic & Repair Cost for 1999 Ford Escort Wagon - What to Expect?
I own a 1999 Ford Escort Wagon with a 5-speed transmission and have driven it over 220,000 miles. The vehicle runs smoothly with no obvious performance issues. However, every fe...
1999 Ford Escort | P0455Suzuki Forenza 2005 OBD2 Codes P0420, P0703, and P02BF - Troubleshooting Guide
I'm looking for help diagnosing three OBD2 trouble codes on my 2005 Suzuki Forenza: P0420, P0703, and P02BF. The vehicle has a 1.8L engine with an automatic transmission. The o...
Suzuki Forenza | P04201998 Chevrolet C1500 4.3L V6 Automatic: Check Engine Light History and OBD2 Diagnostic Questions
I own a 1998 Chevrolet C1500 with a 4.3L V6 engine and automatic transmission. The truck has over 150,000 miles, with approximately 75,000 miles at the time of purchase. Recentl...
1998 Chev C1500 4.3 V6 Auto | C1500P0455 and P2187 Fault Diagnosis for 2005 Mazda 3 - EVAP Leak and Lean Mix Issue
I own a 2005 Mazda 3 that runs smoothly under normal conditions, but recently the check engine light activated, triggering two diagnostic trouble codes: P0455 and P21807. I'm se...
Mazda 3 | P0455Practical 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.