DTC Advanced Diagnostics: P0703 (1.5L Engine) (2025)
DTC P0703 : Brake Pedal Position Switch (NC) Malfunction
General Description
The powertrain control module (PCM) detects a brake pedal position switch malfunction by monitoring the signals from the brake pedal position switch. If the PCM continuously inputs an abnormal signal from brake pedal position switch for a specified time during a specified condition, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 5 minutes or more*, Depending on driving conditions** |
| DTC Type | Two drive cycles, MIL off |
*: Symptom 1
**: Symptom 2
Enable Conditions
| Condition | |
|---|---|
| Vehicle | ON mode |
| Other* | Accelerator pedal pressed |
Malfunction Threshold
Either of these conditions occurs:
- Symptom 1
The brake pedal position switch (BKSWNC line) is open for at least 5 minutes when the vehicle speed [Vehicle Speed] is at 12.5 mph (20.0 km/h) or more.
- Symptom 2
The brake pedal position switch (BKSWNC line) is closed for three cycles when the vehicle is stopped (or decelerated to 1.8 mph (3.0 km/h) or less) from vehicle speed [Vehicle Speed] over 24.9 mph (40.0 km/h).
[ ]: HDS Parameter
Possible Cause
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 stuck
- Brake pedal position switch BKSWNC line open (includes poor or loose connection)
- Brake pedal position switch BKSWNC line short to power
- Brake pedal position switch BKSWNC line short to ground
- Brake pedal position switch failure
- PCM internal circuit 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.