P1270 Accelerator pedal sensor: implausible signal
P1270 means: Accelerator pedal sensor: implausible signal. There are usually two throttle or accelerator pedal position sensors and they must agree. Drive gently and have the car checked soon. The repair usually costs about €60–450 in Estonia. The most common cause: dirty throttle body or worn sensor.
What it means
There are usually two throttle or accelerator pedal position sensors and they must agree. The computer found a wrong signal or the two don't match.
This is a make-specific code (BMW). The exact meaning can vary by model and year. On other makes the same code means: Ford: Engine speed or vehicle speed limiter reached.
What you may notice
- Engine light on
- Limp mode with no power
- Throttle response is delayed
- Idle hunts
What could be wrong
- 1Dirty throttle body or worn sensor
- 2Worn accelerator pedal sensor
- 3Corroded connector
- 4Broken wire
Repair difficulty: Moderate
What you can check yourself
Check the throttle body and pedal connectors. Cleaning the throttle body often helps. You can check the simple things yourself, but the repair is best done in a workshop.
How we fix it
- We read the sensor on the diagnostic tool and compare it with other sensors
- We check the connector, supply and ground
- We repair the wiring or replace the sensor or throttle body
Standard SAE description: Accelerator Pedal Position Sensor Signal Plausibility