C0034
1 owner report and 15 manufacturer filings across 7 model years from Ford, Lincoln, Ram.
Where C0034 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Ford Transit | Wheels | 3 | — |
| 2017 Ford Transit | Wheels | 3 | — |
| 2016 Ford Transit | Wheels | 3 | — |
| 2020 Ford Escape | Service Brakes, Air | 2 | — |
| 2019 Ford Transit | Wheels | 2 | — |
| 2020 Lincoln Corsair | Electrical System | 2 | — |
| 2018 Ram 2500 | Service Brakes | — | 1 |
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.
What it gets filed under
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names C0034. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- TSB 20-23232020-09-21 · Service Brakes, Air — Antilock — Wheel Speed Sensor
- Some 2020 Escape/Corsair vehicles built on or before 2-Sep-2020 may exhibit an illuminated anti-lock brake system (ABS) and/or stability-traction control lamp with diagnostic trouble codes (DTCs) C0031, C0034 and/or C0051. This may be due to the ABS wheel speed sensor harness rubbing on the front wheels. To correct the condition, follow the Service Procedure steps to inspect the ABS wheel speed se
- TSB 20-23022020-09-04 · Service Brakes, Air — Antilock — Abs Warning Light
- Some 2020 Escape/Corsair vehicle may exhibit an illuminated ABS and/or stability-traction control lamp with diagnostic trouble codes (DTCs) C0031, C0034, and/or C0051. This may be due to the ABS wheel speed sensor harness rubbing on the front wheels. To correct the condition, follow the Service Procedure steps to inspect the ABS wheel speed sensor harness and install the pigtail service kit.
- SSM 477852019-02-04 · Suspension — Front — Wheel Bearing
- Some 2015-2019 Transit vehicles may exhibit a front wheel bearing type noise or DTCs C0031 and/or C0034 in the anti-lock brake system (ABS) module. If the vehicle exhibits a wheel bearing noise and/or DTCs C0031 and/or C0034, remove the front wheel speed sensor (WSS). Refer to Workshop Manual (WSM), Section 206-09. Using a shop rag, clean any debris from the sensor body as well as the back side of
- SSM 477852019-02-04 · Wheels
- Some 2015-2019 Transit vehicles may exhibit a front wheel bearing type noise or DTCs C0031 and/or C0034 in the anti-lock brake system (ABS) module. If the vehicle exhibits a wheel bearing noise and/or DTCs C0031 and/or C0034, remove the front wheel speed sensor (WSS). Refer to Workshop Manual (WSM), Section 206-09. Using a shop rag, clean any debris from the sensor body as well as the back side of
- SSM 474682018-08-15 · Wheels
- Some 2015-2018 Transit may exhibit a front wheel bearing type noise or DTCs C0031 and/or C034 in the anti-lock brake system (ABS) module. If the vehicle exhibits a wheel bearing noise and/or DTCs C0031 and/or C0034, remove the front wheel speed sensor (WSS). Refer to Workshop Manual (WSM), Section 206-09. Using a shop rag, clean any debris from the sensor body as well as the back side of the beari
What C0034 means
Source: SAE J2012 / OBD-IIC0034 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
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 C0034
Source: NHTSA files and the OBD-II standardCan I keep driving with C0034 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. 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.