Powertrain fault codes
Engine, fuel, air, ignition, emissions and transmission. The overwhelming majority of what workshops bring to the AI.
400 documented codes across 25 functional group s.
By what part of the vehicle
- Not yet classified 79 codes
- Transmission 37 codes
- Turbo and boost control 26 codes
- Fuel pressure and delivery 23 codes
- Lambda and O2 sensors 21 codes
- Air intake and MAF/MAP 20 codes
- Valve timing and camshaft 17 codes
- Diesel particulate filter 16 codes
- SCR and AdBlue 15 codes
- EVAP and fuel tank 15 codes
- Throttle and pedal 15 codes
- ECU internal and software 13 codes
- Idle and speed control 11 codes
- Cooling and thermostat 10 codes
- Injectors 10 codes
- Fuel trim: lean or rich 9 codes
- Glow plugs and preheat 9 codes
- Hybrid and EV propulsion 9 codes
- Misfire 8 codes
- EGR 8 codes
- Exhaust pressure and temperature 7 codes
- Charging and system voltage 6 codes
- Engine oil and lubrication 6 codes
- Catalytic converter 5 codes
- Ignition and knock sensing 5 codes
The ones we see most
- P0299 Turbocharger underboost condition
- P0171 System too lean, bank 1
- P0300 Random or multiple cylinder misfire detected
- P2002 Diesel particulate filter efficiency below threshold, bank 1
- P0420 Catalyst system efficiency below threshold, bank 1
- P20EE SCR NOx catalyst efficiency below threshold, bank 1
- P0011 A camshaft position timing over-advanced or system performance, bank 1
- P0128 Coolant thermostat, coolant below regulating temperature
- P0303 Cylinder 3 misfire detected
- P0301 Cylinder 1 misfire detected
- P0017 Crankshaft/camshaft position correlation, bank 1 sensor B
- P0087 Fuel rail/system pressure too low
- P0401 Exhaust gas recirculation flow insufficient
- P0101 Mass or volume air flow circuit range/performance
- P2463 Diesel particulate filter restriction, soot accumulation
- P0562 System voltage low
- P0201 Injector circuit open, cylinder 1
- P2563 Turbocharger boost control position sensor circuit range/performance
- P0090 Fuel pressure regulator 1 control circuit
- P0016 Crankshaft/camshaft position correlation, bank 1 sensor A
- P0234 Turbocharger overboost condition
- P0204 Injector circuit open, cylinder 4
- P0202 Injector circuit open, cylinder 2
- P0193 Fuel rail pressure sensor circuit high
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Learn more: Diagnostic (vehicle-first start), Diagnostic form: description, error codes and mileage
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo (JPEG or PNG) of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Learn more: OBD reader photo scan (fault codes from a photo), Voice input for the problem description
Are the public fault code pages built from my diagnostics?
They are built from anonymised, aggregated diagnostics run in WrenchLane; no workshop, customer or vehicle can be identified. Each fault code page shows how often the code was seen across those diagnostics and in how many separate workshops.
Learn more: Fault code pages on wrenchlane.com (fault-code cluster)
Put a code against a real car
Enter the code and the symptoms and get ranked probable causes for that specific vehicle, with the checks in the order worth doing them. Free account, no card.
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