C1236 — 9 documented meanings by make
Documented by: CHEVROLET (USA), CHRYSLER, DAIHATSU, FORD, JAGUAR, MAZDA, MITSUBISHI, SUZUKI, TOYOTA — the meaning can differ between manufacturers
C1236 does not mean the same thing on every car — manufacturers reuse the number for different faults. 9 makes document it: Chevrolet (USA), Chrysler, Daihatsu, Ford, Jaguar, Mazda, Mitsubishi, Suzuki, Toyota. Find your make below.
| Make | Documented meaning | Points at |
|---|---|---|
| Chevrolet (USA) | Low system supply voltage | signal too low |
| Chrysler | Drive test: test timeout | |
| Daihatsu | Front left wheel speed sensor | ABS / wheel speed |
| Ford | Rear left wheel speed sensor input signal missing | ABS / wheel speed |
| Jaguar | Rear left wheel speed signal missing | ABS / wheel speed |
| Mazda | Rear left ABS wheel speed sensor/sensor rotor | ABS / wheel speed |
| Mitsubishi | Front left control solenoid pressure holding system | |
| Suzuki | Transfer shift actuator motor position switch 2, short circuit | transmission |
| Toyota | Foreign matter on front left sensor |
C1236 on Chevrolet (USA)
On Chevrolet (USA) vehicles C1236 is documented as: Low system supply voltage. C1236 is stored when the ECU sees signal too low on the circuit named in the code. That describes how the circuit is behaving, not which part has failed — the wiring, the connector and the component itself can all produce it, which is why the checks below start with the cheapest.
Usually one of: High resistance in the supply or ground path, dragging the signal down; Corroded connector adding resistance the module reads as a low reading; Sensor drifted out of tolerance with age; Partial short to ground somewhere in the signal line.
Check first, cheapest first:
- Read the live value on a scanner and compare with a known-good reading
- Clean and re-seat the connector, then re-test before replacing anything
- Check the ground point for that circuit — a poor ground causes this far more often than a bad sensor
- Measure the sensor against specification with the connector back-probed
- Replace the sensor only once the wiring and ground have been ruled out
Related Chevrolet (USA) codes:
C1236 on Daihatsu
On Daihatsu vehicles C1236 is documented as: Front left wheel speed sensor. C1236 points at ABS / wheel speed (front left). The standard definition names the system involved; which part inside it has actually failed is what the checks below establish, cheapest first.
Related Daihatsu codes:
C1236 on Ford
On Ford vehicles C1236 is documented as: Rear left wheel speed sensor input signal missing. C1236 points at ABS / wheel speed (rear left). The standard definition names the system involved; which part inside it has actually failed is what the checks below establish, cheapest first.
Related Ford codes:
C1236 on Jaguar
On Jaguar vehicles C1236 is documented as: Rear left wheel speed signal missing. C1236 points at ABS / wheel speed (rear left). The standard definition names the system involved; which part inside it has actually failed is what the checks below establish, cheapest first.
Related Jaguar codes:
C1236 on Mazda
On Mazda vehicles C1236 is documented as: Rear left ABS wheel speed sensor/sensor rotor. C1236 points at ABS / wheel speed (rear left). The standard definition names the system involved; which part inside it has actually failed is what the checks below establish, cheapest first.
Related Mazda codes:
C1236 on Suzuki
On Suzuki vehicles C1236 is documented as: Transfer shift actuator motor position switch 2, short circuit. C1236 points at transmission. The standard definition names the system involved; which part inside it has actually failed is what the checks below establish, cheapest first.
Related Suzuki 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
C1xxx is suspension, steering, active systems.
Severity
Suspension or steering — on active systems (ESP, air suspension) the code usually comes from a sensor, not the part itself.
That is what holds for C1236 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 figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
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 →