DTC Advanced Diagnostics: P0571 (1.5L Engine) (2025)
DTC P0571 : Brake Pedal Position Switch Circuit 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 on* 1, off* 2* 3 |
*: Symptom 1
**: Symptom 2
*1: USA/Canada models with CVT
*2: USA/Canada models with M/T
*3: Mexico models
Enable Conditions
| Condition | |
|---|---|
| Vehicle | ON mode |
| Other* | Accelerator pedal pressed |
Malfunction Threshold
Either of these conditions occurs:
- Symptom 1
The brake pedal position switch (STOP_SW line) is closed 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 (STOP_SW line) is open 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 STOP_SW line open (includes poor or loose connection)
- Brake pedal position switch STOP_SW line short to power
- Brake pedal position switch STOP_SW line short to ground
- Brake pedal position switch failure
- PCM internal circuit failure
Diagnosis Details* 1
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, the MIL comes on and a Confirmed DTC, the freeze data, and the on-board snapshot are stored.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.
Diagnosis Details* 2* 3
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.