P1797
Park/Neutral Position Switch Signal Malfunction
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Engine won't start
- Incorrect indication of selector position on the dashboard
- Floating idle speed
- Check Engine light comes on
- The vehicle can be started in positions other than P or N
Causes
- Gear selector position sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Mechanical damage to the sensor or selector lever
- Engine control unit malfunction
How to Fix
- Check the condition of the sensor and its fastening
- Check the integrity of wiring and connectors
- Measure the sensor resistance in different selector positions
- If necessary, replace the P/N position sensor
- Check and clean ECU connector contacts