U0140 A module has stopped hearing from the body control module
5 owner reports and 213 manufacturer filings across 64 model years from Buick, Cadillac, Chevrolet, Chrysler and others.
Where U0140 shows up
Source: NHTSA manufacturer communications and complaintsShowing the 25 model years where U0140 appears most; it is on file for 64 in total.
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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U0140 by make
The same record, one make at a time: the model years, bulletins and owner reports that name U0140 on that maker’s vehicles.
What it gets filed under
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
The vehicle recieved a fault code U0140 stating loss of communication with body control module
Issues appeared immediately after purchase and include: “Smart Key Not Detected” error Traction Control, VSC, and ABS warning lights TPMS malfunction warning Sudden clunks from rear suspension Irregular tire wear DTCs like U1117, U0140…
I used my scanner to see what the codes are, and it have me a "Power Steering Control Module" C0800-03 code, as well as a "Keyless Entry" U0140, a "Parking Assist Module" U0420 code
213 manufacturer filings name U0140. 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 U0140.
- PIC6607B Service bulletin2025-09-27 · Unknown Or Other
- This Preliminary information communicates not to replace the Image processing Module if the following DTC's are history - U3000 SYM49, U1624, U0140, U023B SYM00, U053C, B1DD SYM57.
- PIC6607A Service bulletin2025-09-08 · Unknown Or Other
- This Preliminary information communicates not to replace the Image processing Module if the following DTC's are history - U3000 SYM49, U1624, U0140, U023B SYM00, U053C, B1DD SYM57.
- 9100641 Service bulletin2025-08-05 · Power Train
- Symptoms/Condition: Shifter reports loss communication AND NO OTHER MODULES report the condition. Diagnostic: Please make sure ONLY shifter reports loss communication. If there are other modules reporting loss communication, then follow the existing service procedure Repair Procedure: 1. Verify Complaint - ESM reports a Loss of Communication (LOC) DTC, but no other modules do. - If multiple module
- PIC6607 Service bulletin2025-05-09 · Unknown Or Other
- This Preliminary information communicates not to replace the Image processing Module if the following DTC's are history - U3000 SYM49, U1624, U0140, U023B SYM00, U053C, B1DD SYM57.
- 9100215 Service bulletin2023-11-07 · Electrical System — Body Control Module/Bcm
- Body Control Module For concern related to DTC U0140 - Lost Communication with Body Control Module, please follow published diagnostic information for this DTC to ensure all module connections are secure. Please check all the connections at BCM from other modules that could potentially report a loss of communication with the BCM and ensure that they are fully seated as per diagnostic information.
- 9100215 Service bulletin2023-10-27 · Structure
- Body Control Module For concern related to DTC U0140 - Lost Communication with Body Control Module, please follow published diagnostic information for this DTC to ensure all module connections are secure. Please check all the connections at BCM from other modules that could potentially report a loss of communication with the BCM and ensure that they are fully seated as per diagnostic information.
What U0140 means
Source: SAE J2012 / OBD-IIA module has stopped hearing from the body control module.
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 U0140
Source: NHTSA files and the OBD-II standardCan I keep driving with U0140 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.