DTC Advanced Diagnostics: P1701 (2.0L Engine) (2024 2025)
DTC P1701 : Back-Up Light Switch Malfunction
General Description
The powertrain control module (PCM) monitors the back-up light switch for rationality faults. The back-up light switch signal is used to detect whether the vehicle is running in reverse. If the back-up light switch is stayed ON for a certain distance, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 0.5 seconds or more |
| DTC Type | Two drive cycles, MIL off |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [Battery] | 10.5 V | - |
| Vehicle | ON mode | |
[ ]: HDS Parameter
Malfunction Threshold
The back-up light switch stayed ON for at least 100 milliseconds while the vehicle is driven for more than 2 miles (2 km).
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.
- Back-up light switch BACK_LT line short to power
- Back-up light switch stuck on
- 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.