P057D code meaning
Brake Pedal Position Sensor A Circuit High
Powertrain system Generic code P05xx codes Check engine light
What P057D means
The brake pedal position sensor A is an analogue 5 V sensor giving pedal travel continuously; its rest position (about 1 V) is learned. GM reads it in the engine module from about 2012 and uses it as an enabling condition of transmission monitors – hence type A, warning lamp after one trip, unlike cruise control codes. On any circuit fault GM sets the pedal to 0 %, so brake detection relies on the brake light switch. P057D means the signal is too high: GM above 95 in 20 of 32 samples and calls this explicitly an open circuit – an open signal or ground line is pulled up. A short to 5 V or battery acts the same. 'High' means signal, not a fully pressed pedal. GM bulletins name connector X205 on 2012–14 pick-ups.
P057D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P057D
- Check engine light on (GM, one trip)
- Cruise unavailable, brake light or stability messages
- Possible power reduction
Common causes of P057D
- Most likelyGround or signal line open, connector X205 with poor contact
- PossibleSensor faulty
- Less likelySignal shorted to voltage
- Less likelySensor misinstalled or misadjusted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake pedal position sensorSensor wiringEngine control module
What each part of P057D means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 7D | The exact fault in that area. |
What to do next
- Note P057D and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P057D
What does P057D mean?
P057D means "Brake Pedal Position Sensor A Circuit High". The brake pedal position sensor A is an analogue 5 V sensor giving pedal travel continuously; its rest position (about 1 V) is learned. It is a generic code, so it means the same on every make.
Is it safe to drive with P057D?
Drive gently and only to a workshop. With P057D the car can go into limp mode (reduced power) to protect itself.
Will P057D fail an emissions test?
Yes, it can. P057D is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P057D to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P057D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.