B1751
Park/Neutral Switch Circuit Short To Battery
B1751 is an OBD-II diagnostic trouble code meaning: Park/Neutral Switch Circuit Short To Battery. Common causes: wiring harness short circuit to +12v, park/neutral position sensor malfunction. Estimated repair cost: $33–167.
Symptoms
- The car may not start
- Incorrect starter operation (may spin the engine in gear)
- Activating transmission emergency mode
- Gearbox mode light flashing
Causes
- Wiring harness short circuit to +12V
- Park/neutral position sensor malfunction
- Damage to the sensor connector
- Problems with the transmission control unit
- Incorrect installation of the sensor after repair
How to Fix
- Check the voltage at the sensor connector at different selector positions
- Visually inspect the wiring harness for damage.
- Check the sensor resistance in different selector positions
- Replace the park/neutral position sensor if it is faulty
- Repair or replace damaged wires
- If necessary, reflash the transmission control unit
Related codes
FAQ
What does the B1751 code mean?
B1751 is an OBD-II diagnostic trouble code that indicates: Park/Neutral Switch Circuit Short To Battery
What causes a B1751 error code?
The most common causes of B1751 include: Wiring harness short circuit to +12V; Park/neutral position sensor malfunction; Damage to the sensor connector; Problems with the transmission control unit.
How do I fix a B1751 diagnostic trouble code?
To fix B1751: Check the voltage at the sensor connector at different selector positions. Visually inspect the wiring harness for damage.. Check the sensor resistance in different selector positions. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1751?
Limited driving only, diagnose soon
How much does it cost to fix B1751?
The estimated repair cost for B1751 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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