C1382 — 2 documented meanings by make

C1382 does not mean the same thing on every car — manufacturers reuse the number for different faults. 2 makes document it: Mitsubishi, Saab. Find your make below.

C1382 on Mitsubishi

On Mitsubishi vehicles C1382 is documented as: Straight G sensor, low voltage. C1382 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:

1. Read the live value on a scanner and compare with a known-good reading
2. Clean and re-seat the connector, then re-test before replacing anything
3. Check the ground point for that circuit — a poor ground causes this far more often than a bad sensor
4. Measure the sensor against specification with the connector back-probed
5. Replace the sensor only once the wiring and ground have been ruled out

Related Mitsubishi codes:

C1382 on Saab

On Saab vehicles C1382 is documented as: Rear left wheel sensor, no signal. C1382 is stored when the ECU sees no signal on the circuit named in the code (rear left). 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: Module has no power or no ground; Broken bus wire or a bad splice in the network; The module itself has failed; Terminating resistor or bus fault taking the network down.

Check first, cheapest first:

1. Check power and ground at the module before suspecting the module itself
2. Read whether other modules on the same bus also report faults — that separates a network fault from a single module
3. Inspect connectors at the module and any inline joints
4. Measure bus resistance across the two lines at the diagnostic socket
5. Replace the module last, once supply and network are proven good

Related Saab 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:

1. 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.
2. Read all stored codes together — the neighbouring ones usually point at which system is involved and narrow the list.
3. Check freeze-frame data: the RPM, temperature and load at the moment it triggered indicate which system was active.
4. 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 C1382 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.