Throttle and pedal
Throttle position, throttle actuator and accelerator pedal sensors. Redundant-sensor disagreement here puts the car straight into limp mode.
15 documented codes across 38 real diagnostics.
Ranked by how often we actually see them
| Code | What it is | Diagnostics |
|---|---|---|
| P0121 | Throttle or pedal position sensor A circuit range/performance | 7 |
| P0222 | Throttle or pedal position sensor B circuit low | 4 |
| P0120 | Throttle or pedal position sensor A circuit | 4 |
| P2100 | Throttle actuator control motor circuit open | 4 |
| P2101 | Throttle actuator control motor circuit range/performance | 3 |
| P2135 | Throttle or pedal position sensor A/B voltage correlation | 3 |
| P2125 | Throttle or pedal position sensor E circuit | 3 |
| P0122 | Throttle or pedal position sensor A circuit low | 2 |
| P2138 | Throttle or pedal position sensor D/E voltage correlation | 2 |
| P0221 | Throttle or pedal position sensor B circuit range/performance | 1 |
| P2102 | Throttle actuator control motor circuit low | 1 |
| P2110 | Throttle actuator control system, forced limited RPM | 1 |
| P0223 | Throttle or pedal position sensor B circuit high | 1 |
| P2121 | Throttle or pedal position sensor D circuit range/performance | 1 |
| P2122 | Throttle or pedal position sensor D circuit low input | 1 |
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Learn more: Diagnostic (vehicle-first start), Diagnostic form: description, error codes and mileage
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo (JPEG or PNG) of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Learn more: OBD reader photo scan (fault codes from a photo), Voice input for the problem description
Are the public fault code pages built from my diagnostics?
They are built from anonymised, aggregated diagnostics run in WrenchLane; no workshop, customer or vehicle can be identified. Each fault code page shows how often the code was seen across those diagnostics and in how many separate workshops.
Learn more: Fault code pages on wrenchlane.com (fault-code cluster)
Work a throttle and pedal fault on a real car
Enter the codes and the symptoms and get ranked probable causes for that specific vehicle, with the checks in the order worth doing them. Free account, no card.
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