Chevrolet fault codes
25 distinct codes across 26 real diagnostics on Chevrolet, including the Chevrolet-specific ones no generic code list can decode.
Chevrolet-specific codes
These are manufacturer-specific, which means the same code on another marque is a different fault. That is exactly why they have no page of their own here and no entry in any generic code list: a single description for one of these would be wrong more often than right. Below they are scoped to Chevrolet, ranked by how often we have actually seen them, which is a claim we can stand behind.
| Code | Diagnostics on Chevrolet |
|---|---|
| P1133 | 3 |
To turn one of these into a cause you need the marque, the model and the engine, which is what the tool does. A code on its own is a starting point, not an answer.
Standard codes we see most on Chevrolet
These are standardised, so they mean the same thing on every vehicle and each one has a page of its own. The counts are what we see on Chevrolet specifically.
| Code | What it is | On Chevrolet |
|---|---|---|
| P0420 | Catalyst system efficiency below threshold, bank 1 | 7 |
| C0561 | Not individually documented | 6 |
| C0899 | Not individually documented | 6 |
| P0700 | Transmission control system, MIL request | 6 |
| P0751 | Shift solenoid A performance or stuck off | 6 |
| P0300 | Random or multiple cylinder misfire detected | 3 |
| P0335 | Crankshaft position sensor A circuit | 3 |
| P0010 | A camshaft position actuator circuit, bank 1 | 2 |
| P0013 | B camshaft position actuator circuit, bank 1 | 2 |
| P0722 | Not individually documented | 2 |
| P0894 | Not individually documented | 2 |
| P0030 | O2 sensor heater control circuit, bank 1 sensor 1 | 1 |
| P0087 | Fuel rail/system pressure too low | 1 |
| P0089 | Fuel pressure regulator 1 performance | 1 |
| P0135 | O2 sensor heater circuit, bank 1 sensor 1 | 1 |
| P0302 | Cylinder 2 misfire detected | 1 |
| P0340 | Camshaft position sensor A circuit, bank 1 | 1 |
| P0521 | Engine oil pressure sensor or switch range/performance | 1 |
| P0703 | Brake switch B circuit | 1 |
| P2138 | Throttle or pedal position sensor D/E voltage correlation | 1 |
| U0121 | Lost communication with ABS control module | 1 |
| U2105 | Not individually documented | 1 |
What tends to go wrong on Chevrolet
By share of the codes we have seen on this marque. A description of our own caseload, not a reliability ranking.
- Transmission · 17
- Chassis, manufacturer-specific · 12
- Valve timing and camshaft · 8
- Catalytic converter · 7
- Misfire · 4
- Lambda and O2 sensors · 3
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)
Decode a Chevrolet code against the actual car
Enter the code, the model 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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