DTC Advanced Diagnostics: P0703 (2025)
DTC P0703: Brake Pedal Position Switch (NC) Malfunction
General Description
If the vehicle is stopped without pressing the brake pedal from a certain vehicle speed for a specified time (stuck released), or if the brake pedal is pressed while the accelerator pedal is pressed and there is a certain vehicle speed for a specified duration (stuck pressed), the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | Depending on driving conditions*, 5 minutes or more** |
| DTC Type | Two drive cycles, MIL off |
* : Stuck released** : Stuck pressed
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [Battery] | 10 V | - |
[ ]: HDS Parameter
Malfunction Threshold
- Stuck released
The vehicle stop is repeated 3 times with the following conditions after the vehicle speed [Vehicle Speed] reached 25 mph (40 km/h):
- Brake pedal position switch (BKSWNC line) is closed
- None of brake control request is received from other units via CAN
- Stuck pressed
The brake pedal position switch (BKSWNC line) is opened for at least 5 minutes when the vehicle speed [Vehicle Speed] is at 13 mph (20 km/h) or more.
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Brake pedal position switch failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, a Confirmed DTC, the freeze data, and the on-board snapshot are stored. The MIL does not come on.
Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.