B1151 — meaning by make (3 makes)
Documented by: CHEVROLET (USA), FORD, MAZDA — the meaning can differ between manufacturers
B1151 does not mean the same thing on every car — manufacturers reuse the number for different faults. 3 makes document it: Chevrolet (USA), Ford, Mazda. Find your make below.
| Make | Documented meaning | Points at |
|---|---|---|
| Chevrolet (USA) | Deployment commanded - frontal | airbag / restraint system |
| Ford | Radio frequency AM/FM signal key select output, short circuit to ground | immobiliser / key · short to ground |
| Mazda | Radio frequency AM/FM signal key select output, short circuit to ground | immobiliser / key · short to ground |
B1151 on Chevrolet (USA)
On Chevrolet (USA) vehicles B1151 is documented as: Deployment commanded - frontal. B1151 points at airbag / restraint system. The standard definition names the system involved, not which part inside it has failed.
Related Chevrolet (USA) codes:
B1151 on Ford, Mazda
On Ford, Mazda vehicles B1151 is documented as: Radio frequency AM/FM signal key select output, short circuit to ground. B1151 is stored when the ECU sees short to ground on immobiliser / key. That describes how the circuit is behaving, not which part has failed — the wiring, the connector and the component itself can all produce it.
Related Ford, Mazda codes:
Which one is yours
A generic OBD reader gives you the number, not which of these meanings your manufacturer assigned to it. To get to the specific one:
- Use a brand-specific scanner — VCDS for VAG, INPA or ISTA for BMW, XENTRY for Mercedes, Forscan for Ford. It shows the manufacturer's own text rather than the generic one.
- Read all stored codes together — the neighbouring ones usually point at which system is involved and narrow the list.
- Check freeze-frame data: the RPM, temperature and load at the moment it triggered indicate which system was active.
- If you have no brand scanner, tell me the make and model below and I will tell you which of these applies to your car.
Code family
B1xxx is body systems, manufacturer-specific.
That is what holds for B1151 in general. From here it depends on your engine — tell me which car it is and what it does, and I will give you the steps for it: real procedures, torque figures and diagrams instead of general advice.
Why TorqFix for your car?
Above is what the code means and why it appears. TorqFix goes further — it gives you specific procedures, torque values, wiring diagrams and pinouts for your exact engine, not generic steps for every car. Real workshop data (127,000+ diagrams, 10,000+ procedures), interpreted by AI in your language.
Free with an account: 4 questions per day · drawings are Pro. Signing up takes twenty seconds and needs no card.
Code breakdown
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The code meanings come from the SAE/ISO definitions and from what each manufacturer documents for the same code, shown by make. The notes on causes and checks are general guidance built from the code family, not a factory test plan for your car.
The same code can mean different things on different makes. Match the meaning to your make before acting on it.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix → · How these pages are made →