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.
2000 VW Beetle TDI P1556 Code: Diagnosis and Solutions for Power Loss and Fuel Efficiency
Hi everyone, new to the forum but experienced with OBD diagnostics. I'm currently troubleshooting my 2000 Volkswagen Beetle TDI (diesel) that's showing a P1556 fault code. The c...
00 beetle | P15562000 Audi A4 P1136 Code: Long Term Fuel Trim Issue and O2 Sensor Diagnosis
My 2000 Audi A4 with 57,000 miles has a P1136 diagnostic code indicating a long-term fuel trim issue. I recently discovered a loose vacuum hose located just behind the throttle ...
2000 Audi A4 | P11362001 Pontiac Grand Am GT P0135 O2 Sensor Heater Circuit Fault: Diagnosis and Fix
My 2001 Pontiac Grand Am GT, with approximately 95,000 miles, has been consistently throwing a P0135 diagnostic trouble code (DTC), indicating an 'O2 Sensor Heater Circuit Malfu...
2001 Pontiac Grand Am GT | P01351999 Cadillac Deville with P0101, P0741, and P0503 Codes - Engine Swap from 2003 Northstar V8
I recently ran a diagnostic on my 1999 Cadillac Deville equipped with a swapped 2003 Northstar V8 engine. The vehicle is showing three trouble codes: P0101, P0741, and P050
99 Cadillac Deville | P21771998 Dodge Caravan P0172 Code: Engine Dies at Idle, Stalls Below 500 RPM
My 1998 Dodge Caravan starts fine and runs smoothly above 15 mph, but when coming to a stop, it drops to around 500 RPM and begins to stall. It has died once while stationary th...
caravan | P01722003 Ford Fiesta 1.4 Zetec P0420 Code: Misfire & Catalytic Converter Efficiency Explained
My 2003 Ford Fiesta 1.4 Zetec petrol engine had a coil pack failure affecting two cylinders, which I replaced recently. After the repair, the engine runs smoothly, but the check...
Fiesta | P04202003 Ford Explorer P0775 Code: Overdrive Light On, Slow 1-2 Shift with High RPMs
I own a 2003 Ford Explorer with a V6 engine and approximately 102,000 miles. Recently, both the overdrive light and the check engine light have come on, triggering Diagnostic Tr...
2003 Ford Explorer | P07751998 Ford Escort ZX2 P1383: Timing Belt Replacement and Internal Damage Risk
I recently discovered that my 1998 Ford Escort ZX2 has a broken timing belt, and I'm concerned about potential internal engine damage before proceeding with the replacement. Sin...
1998 Ford Escort ZX2 | P1383PO132, PO135, PO141, PO138 OBD2 Error Codes for 1996 Dodge Dakota - Idle Instability After Muffler Repair
My check engine light came on recently on my 1996 Dodge Dakota, and shortly after I noticed the truck was struggling to idle smoothly. After sitting still for 3-5 minutes, it wo...
96 Dakota | P01322002 Toyota Sienna P0440 Code Fixed: EVAP System Repair Guide with VSV and Charcoal Canister Replacement
Even though I didn
02 Sienna | P04401998 Ford Escort 1.8 TD P0204 and P1765 Fault Codes: Injector Circuit Issue and Turbo Behavior
I'm experiencing P0204 and P1765 fault codes on my 1998 Ford Escort 1.8 TD. The P0204 code indicates a possible injector circuit or open circuit in cylinder 4, while P176
1998 ford escort 1.8 td | P0204Ford Escort 1998 1.8TD P1765 Fault Code: Timing Issue and P0204 Injector Circuit Problem?
I'm experiencing a recurring fault code P1765 on my 1998 Ford Escort 1.8TD, which returns even after clearing the code. I suspect this may be related to timing issues. Additiona...
Ford Escort | P176599 Dodge Ram 1500 5.9L Z Engine P0123 Code: Diagnosis and Fix for 4x4 Vehicle with Idle and Acceleration Issues
I own a 1999 Dodge Ram 1500 4x4 equipped with the 5.9L Z engine, and I'm currently experiencing a persistent P0123 trouble code — which indicates a 'Throttle Position Sensor (TP...
99 dodge ram 1500 | P01232003 Mazda 6 2.3L AT - Is P0012 'B' the Same as P0012 'A'? Understanding Diagnosis and Fixes
I own a 2003 Mazda 6 with a 2.3L engine and automatic transmission. Recently, I've been receiving a P0012 'B' diagnostic trouble code. The engine is now exhibiting knocking or t...
2003 MAZDA 6 | P00122003 Chrysler Town & Country P0351, P0352, P0353 Error Codes - Ignition Coil Issues and Diagnosis
I own a 2003 Chrysler Town & Country and recently experienced repeated starting problems. The engine would crank but not start, often sounding like the battery was dead—though b...
2003 Chrysler T&C | P03512000 Dodge Grand Caravan 3.3 ... code 1391
Ive read from much older post that the bucking and erractic acceleration may be due to a cracked driveplate...flexplate or flywheel ??? Any leads where I may be able to price or...
2000 Dodge Grand Caravan 3.3 | P13912004 Lamborghini Gallardo P0300 P1305 P1106 - Meaning and Diagnosis of OBD2 Fault Codes
I'm looking for clarification on what the OBD2 fault codes P0300, P1305, and P1106 mean specifically in a 2004 Lamborghini Gallardo. These codes are appearing in my vehicle's ch...
2004 Lamborghini Gallardo | P0300Practical 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.