U0141

Lost Communication With Body Control Module A

Body control network Generic OBD-II Medium

What it means

U0141 means the network has lost communication with the body control module (BCM), which runs much of the vehicle's body electronics — lighting, locks, wipers, and more. Losing it can leave several features dead or erratic, and because the BCM often ties into the immobilizer, some vehicles won't start. The usual cause is a power/ground or fuse problem, damaged wiring or a connector, a bus fault, or a failed BCM.

Medium

Can I keep driving? Often driveable, but body features like lights, locks, and wipers may misbehave, and on vehicles where the BCM handles the immobilizer the engine may not start — diagnose promptly.

Real-world scan data

Seen in

706

scans in the past year

Found in

0.1%

of scans

0.2%

of scans that found faults

Appears alongside · share of U0141 scans

U0155in 54.5% of scans

U0121in 44.9% of scans

U0140in 44.9% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Multiple body features dead or erratic (interior/exterior lights, locks, wipers)
Warning lights and message-center errors
Body control module unresponsive when scanned
No-crank or no-start on some vehicles

Common causes

Most likely first

Poor power, ground, or a blown fuse at the BCMLikely
Wiring or connector fault at the BCMCommon
CAN bus fault interrupting the moduleCommon
Failed body control moduleLess often

How to diagnose & fix

Work through it in order

Scan all modules and confirm the BCM is offline via companion U-codes.
Check BCM power, grounds, and related fuses first.
Inspect the BCM connectors and bus wiring for damage or corrosion.
Confirm bus continuity to the module.
Repair the wiring or replace and program the BCM, then clear codes and retest.

FAQ

Quick answers

Is it safe to drive with U0141?+

It depends on your vehicle. Many stay driveable with only body features affected, but because the BCM is often tied into the immobilizer and starting system, some cars won't crank — so have it diagnosed promptly.

Can I just clear U0141?+

It returns until the BCM communicates again. A replacement BCM usually also needs programming to the vehicle, so this is not a clear-and-go fix.

Read & clear U0141 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX