P1297 — 8 documented meanings by make

P1297 does not mean the same thing on every car — manufacturers reuse the number for different faults. 12 makes document it: Audi, Chrysler, Citroen, Ford, Honda, Isuzu, Mazda, Mitsubishi, Peugeot, SEAT, Skoda, Volkswagen. Find your make below.

P1297 on Audi, SEAT, Skoda, Volkswagen

On Audi, SEAT, Skoda, Volkswagen vehicles P1297 is documented as: Charger to throttle valve connection, pressure loss.

Related Audi, SEAT, Skoda, Volkswagen codes:

P1297 on Chrysler

On Chrysler vehicles P1297 is documented as: No change in manifold absolute pressure sensor from start to run. P1297 points at manifold pressure sensor. The standard definition names the system involved; which part inside it has actually failed is what the checks below establish, cheapest first.

Related Chrysler codes:

P1297 on Citroen, Peugeot

On Citroen, Peugeot vehicles P1297 is documented as: Injector high-pressure side shorted together; SIRIUS81 (EW10D), fuel rail pressure, high value received. P1297 is stored when the ECU sees signal too high on fuel injector. 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: Open ground for the sensor, letting the signal float up; Signal line shorted to a supply voltage; Sensor failed open, which the module reads as maximum; Connector fault interrupting the return path.

Check first, cheapest first:

1. Read the live value and compare with what the conditions should produce
2. Check the sensor ground continuity back to the module
3. Unplug the sensor: if the reading changes, the wiring is intact and the sensor is suspect
4. Inspect the connector for corrosion or a spread terminal
5. Replace the sensor once ground and signal wiring are confirmed good

Related Citroen, Peugeot codes:

P1297 on Ford, Mazda

On Ford, Mazda vehicles P1297 is documented as: Injector high side switches, short circuit. P1297 is stored when the ECU sees signal too high on fuel injector. 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: Open ground for the sensor, letting the signal float up; Signal line shorted to a supply voltage; Sensor failed open, which the module reads as maximum; Connector fault interrupting the return path.

Check first, cheapest first:

1. Read the live value and compare with what the conditions should produce
2. Check the sensor ground continuity back to the module
3. Unplug the sensor: if the reading changes, the wiring is intact and the sensor is suspect
4. Inspect the connector for corrosion or a spread terminal
5. Replace the sensor once ground and signal wiring are confirmed good

Related Ford, Mazda codes:

P1297 on Honda

On Honda vehicles P1297 is documented as: Electrical load detector circuit, low voltage. P1297 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 Honda codes:

P1297 on Isuzu

On Isuzu vehicles P1297 is documented as: Electrical load detector circuit low input. P1297 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 Isuzu codes:

P1297 on Mitsubishi

On Mitsubishi vehicles P1297 is documented as: No change in manifold absolute pressure from start to run. P1297 points at manifold pressure sensor. The standard definition names the system involved; which part inside it has actually failed is what the checks below establish, cheapest first.

Related Mitsubishi 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

P1xxx is manufacturer-specific code (VW/Audi, BMW, Mercedes, Toyota etc. have different meanings for the same code number).

Severity

Manufacturer-specific codes need a brand scanner (VCDS for VAG, INPA for BMW, STAR for Mercedes).

That is what holds for P1297 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.