OBD-II Diagnostic Trouble Code Reference
A complete reference for 6,413 OBD-II diagnostic trouble codes used by passenger and commercial vehicles worldwide — with definitions, common causes, and diagnostic guidance. Codes are organised into four groups: Powertrain (P), Body (B), Chassis (C), and Network (U).
We can permanently disable any DTC.
On every ECU family RaceTune supports, any OBD-II diagnostic trouble code — P, B, C, or U — can be permanently disabled in software. The fault stops being logged, the warning light stays off, and the ECU never enters limp-home for that monitor again. For motorsport, off-road, and export use.
Most-searched codes
The codes tuners ask about most often. Each links to its canonical hub plus per-ECU disable details.
| Code | Description | Group | |
|---|---|---|---|
| P2200 | Sensor Circuit Bank 1 | Powertrain | Details → |
| P2201 | Sensor Circuit Range/Performance Bank 1 | Powertrain | Details → |
| P0471 | Exhaust Pressure Sensor A Circuit Range/Performance | Powertrain | Details → |
| P2080 | Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1 | Powertrain | Details → |
| P20EE | SCR NOx Catalyst Efficiency Below Threshold Bank 1 | Powertrain | Details → |
| P229E | NOx Sensor Heater Control Circuit Bank 1 Sensor 2 | Powertrain | Details → |
| P229F | NOx Sensor Circuit Range/Performance Bank 2 | Powertrain | Details → |
| P040D | Gas Recirculation Temperature Sensor A Circuit High | Powertrain | Details → |
Browse by code range
OBD-II codes are organised by leading letter + range. Click a range to see every code in it.
Pxxx — Powertrain
5,687 codesBxxx — Body
128 codesCxxx — Chassis
131 codesUxxx — Network
467 codesAbout OBD-II diagnostic trouble codes
OBD-II diagnostic trouble codes (DTCs) are standardised fault codes logged by a vehicle's engine control unit when a monitor detects a fault. The first character identifies the system: P for powertrain (engine, transmission), B for body, C for chassis, and U for network/communication faults. The second character indicates whether the code is generic (0) or manufacturer-specific (1–3).
Each code page in this reference includes the official definition, common causes, typical symptoms, and a diagnostic guide. For motorsport, off-road, and export applications, some monitors can also be permanently disabled at the ECU level — that information is included where applicable on each code's page.
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