C0040 A fault in the right front wheel speed sensor circuit
1 owner report and 48 manufacturer filings across 18 model years from Buick, Chevrolet, Ford, GMC and others.
Where C0040 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2022 Ford F-250 Super Duty | Power Train | 4 | — | |
| 2021 Ford F-250 Super Duty | Power Train | 4 | — | |
| 2020 Ford F-250 Super Duty | Power Train | 4 | — | |
| 2022 Ford F-350 Super Duty | Power Train | 4 | — | |
| 2021 Ford F-350 Super Duty | Power Train | 4 | — | |
| 2020 Ford F-350 Super Duty | Power Train | 4 | — | |
| 2022 Ford F-450 Super Duty | Power Train | 4 | — | |
| 2021 Ford F-450 Super Duty | Power Train | 4 | — | |
| 2020 Ford F-450 Super Duty | Power Train | 4 | — | |
| 2016 Chevrolet Colorado | Service Brakes | 3 | — | Brake pads → |
| 2016 GMC Canyon | Service Brakes | 3 | — | Brake pads → |
| 2016 Buick Envision | Wheels | 1 | — | Wheel bearing → |
| 2019 Chevrolet Colorado | Service Brakes | 1 | — | Brake pads → |
| 2020 Chevrolet Impala | Wheels | 1 | — | Wheel bearing → |
| 2019 Chevrolet Impala | Wheels | 1 | — | Wheel bearing → |
| 2023 Chevrolet Traverse | Service Brakes | — | 1 | Brake pads → |
| 2019 GMC Canyon | Service Brakes | 1 | — | Brake pads → |
| 2024 Mazda CX-90 | Electrical System | 1 | — | Battery → |
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
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C0040 by make
The same record, one make at a time: the model years, bulletins and owner reports that name C0040 on that maker’s vehicles.
What it gets filed under
48 manufacturer filings name C0040. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names C0040.
- SA-062-23 Service bulletin2023-10-16 · Electrical System
- Some customers may experience a "Push Button Start Malfunction. Have the Vehicle Inspected" warning message and the following DTC(s) may be stored. C0040:24 - Brake switch (No.1 signal) circuit malfunction P0504:00 - Brake switch system: Circuit malfunction
- SSM 50864 Service bulletin2022-06-16 · Power Train
- Some 2020-2022 F-Super Duty vehicles may exhibit a condition where the vehicle will not shift out of park (P). Diagnostic trouble codes (DTC) C0040 and/or P0504 may also be present. Reference TSB 22-2044 to make sure that no water or corrosion is present in the battery junction box (BJB). If Pinpoint Test A: Brake Shift Interlock in Workshop Manual (WSM), Section 307-05 leads to a concern with cir
- SSM 50848 Service bulletin2022-06-14 · Power Train
- Some 2020-2022 F-Super Duty vehicles may exhibit a condition where the vehicle will not shift out of park (P). Diagnostic trouble codes (DTC) C0040 and/or P0504 may also be present. Reference TSB 22-2044 to make sure that no water or corrosion is present in the battery junction box (BJB). If Pinpoint Test A: Brake Shift Interlock in Workshop Manual (WSM), Section 307-05 leads to a concern with cir
- TSB 22-2044 Service bulletin2022-02-16 · Electrical System
- Some 2020-2022 F-Super Duty vehicles may exhibit a condition where the engine will not turn off and/or have various electrical symptoms including a dead battery, horn stays on and no crank/no start. The vehicle may also have an illuminated anti-lock braking system (ABS) indicator with diagnostic trouble codes (DTCs) C0020 and U3003 in the ABS module. The vehicle may not shift out of park (P) and/o
- PIT5499B Service bulletin2020-05-20 · Air Bags
- This Preliminary Information communication provides information to the technician that vehicles may have an Antilock Braking System or Malfunction Indicator Lamp illuminated. Also Low Brake Fluid lamp on with the master cylinder fluid level is full or a Service Trailer Brake message on the Driver Information Center. Technician may find codes C0035, C0040, C0045, C0050, C0055, C0267, U0121, U0415 o
- PIE0533A Service bulletin2019-12-11 · Wheels
- This engineering information (EI) revision ends the need for information from the field on a condition of wheel speed sensor inoperative with DTCs C0035, C0040, C0045 and/or C0055.
What C0040 means
Source: SAE J2012 / OBD-IIA fault in the right front wheel speed sensor circuit.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about C0040
Source: NHTSA files and the OBD-II standardCan I keep driving with C0040 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.