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.
2003 Chevrolet Cavalier P0172 Code: System Too Rich - Fixed with MAP Sensor Replacement
Last week, my 2003 Chevrolet Cavalier started exhibiting running rich symptoms, leading to black smoke during acceleration. After replacing several common components—oxygen sens...
2003 Cavalier | P01722096 Toyota Camry with P0732 Code: Gear 1 Ratio Issue After Transmission Rebuild and Shift Kit Installation
Hi everyone! I recently rebuilt my 1996 Toyota Camry transmission (A604/41TE) and have less than 1,000 km on it. The rebuild included the A604/41TE Shift Kit by TransGo, which i...
Intrepid 96 ES | P07321997 BMW E39 540i P1174 and P1175 Fault Codes: Diagnosis and Solutions
Hello, I'm experiencing P1174 Fuel Trim Adaptation Additive Bank 1 Malfunction and P1175 Fuel Trim Adaptation Additive Bank 2 Malfunction on my 1997 BMW E39 54-0i with a 6-speed...
1997 E39 BMW 540i | P11752000 Ford Taurus OHV Engine Fault Code P0301: Piston Misfire Diagnosis and Solutions
I'm experiencing a persistent piston misfire on my 2000 Ford Taurus OHV engine. I've already replaced the spark plugs and ignition wires, but the issue continues to reoccur. Wha...
2000 Ford Taurus OHV | P0301Ford Explorer 1997 P0171/P0174 Diagnosis: Intake Leak or Fuel Trim Issue? - Live Data & Scanner Analysis
Hi everyone, I'm facing a persistent issue with my 1997 Ford Explorer (57,000 miles) showing OBD2 codes P0171 and P0174. After reviewing previous posts and performing several ch...
ford | P0171P0420 Chevy Cavalier
Ok when this code came up from a diagnostic test I was told I need a new CAT. No problem! I bought a good one from ebay and had the shop install it. They reset my light and 1...
Chevy Cavalier | P04202003 Honda Civic SI P1166 and P1298 Check Engine Codes: Causes and Fixes
My 2003 Honda Civic SI has 68,000 miles on the odometer. Yesterday while driving to work, the check engine light activated. Using a scan tool, I detected two trouble codes: P116...
2003 Honda Civic SI | P11662000 Honda Civic Ex P0325 Knock Sensor 1 Circuit
I just got a diagnostic report from my hand held tool thing and the code was P0325 Knock Sensor 1 Circuit (Bank 1). The only thing I hear wrong with the car is when I turn the k...
2000 Honda Civic Ex | P03252000 Honda Accord V6 OBD Codes P0420 and P1399: Cat Failure or Misfire? Diagnosis & Solutions
I own a 2000 Honda Accord V6 with only 68,000 miles on the odometer. Recently, I've been receiving two OBD-II diagnostic codes: P0420 and P13909. Initially, the vehicle showed a...
2000 Honda Accord v-6 | P042096 Ford Aerostar P0340 Code: Common Causes and Solutions for Cam Position Sensor Failure
I'm experiencing a P0340 diagnostic trouble code on my 1996 Ford Aerostar, which points to a cam position sensor issue. I've already performed a visual inspection of the sensor ...
96 Ford Areostar | P03401997 Chevrolet 1500 4.3L Engine P0306, P0131, P0174 - Cold Starts Fine, Warm-Up Bogs at 35mph with Loss of Torque
I have a 1997 Chevrolet 1500 with a 4.3L V6 engine. The vehicle runs perfectly when cold, but as it warms up, it begins to bog down and will only reach about 35 mph at around 15...
97' chevy 1500 4.3 | P0131P1133 O2 Sensor Location and Replacement Guide for 2001 Buick Regal 3800 Engine
I'm looking for information about the P1133 fault code on my 2001 Buick Regal with a 3800 engine. This code relates to an oxygen (O2) sensor. Where is this sensor located? What ...
2001 Buick Regal | P11332000 Buick LeSabre P0301 Misfire: Diagnosing Ignition System Issues with Limited Budget
I've replaced the #1 spark plug with a GM OE iridium spark plug, swapped out the #1 ignition wire with a new Delco wire (purchased directly from a Chevrolet dealer), and install...
2000 Buick LeSabre | P0301Practical 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.