Brake Pedal Position Sensor Voltage
Indicates an abnormal voltage from the brake pedal position sensor.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The brake pedal position sensor measures how far you press the brake pedal and sends that info to the computer. If the voltage it sends is too high or too low, the system knows something's wrong with the sensor or wiring.
What the computer is actually seeing
The computer expects a voltage between 0.5V (pedal released) and 4.5V (pedal fully pressed). If it sees values outside of this range consistently, it triggers the code.
What a healthy reading looks like
0.5V to 4.5V depending on pedal position
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the brake fluid level; ensure it is at the proper level in the reservoir.
- 2Inspect wiring and connectors for signs of damage, corrosion, or disconnection. Repair as needed.
- 3Measure voltage at the brake pedal position sensor connector while pressing the pedal; it should vary from 0.5V to 4.5V. If the voltage is constant or outside this range, the sensor is likely faulty.
- 4If the sensor voltage is normal, check the ECU for fault codes or damage that could affect reading from the sensor.
Common causes
- Faulty brake pedal position sensor
- Damaged wiring or connectors
- Corroded terminals in the sensor circuit
Typical repair cost
$$ - $$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
You can drive, but be aware that braking performance can be affected; fix soon.
Will this code come back after clearing it?
If the underlying issue isn't resolved, it will likely return.
Why does this code pair with SPN 3714?
Both codes relate to brake system signals; if one fails, it might affect the other.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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