B1749
Park/Neutral Switch Circuit Failure
B1749 is an OBD-II diagnostic trouble code meaning: Park/Neutral Switch Circuit Failure. Common causes: open or short circuit in p/n switch circuit, the park/neutral switch itself is faulty. Estimated repair cost: $33–167.
Symptoms
- Car won't start in park or neutral
- Transmission malfunction
- Indication of incorrect selector position on the instrument panel
- Activating transmission emergency mode
Causes
- Open or short circuit in P/N switch circuit
- The park/neutral switch itself is faulty
- Oxidation or damage to contacts in connectors
- Wiring Harness Problems
- Transmission control module malfunction
How to Fix
- Check the status of the P/N switch
- Inspect the switch circuit for breaks or damage.
- Check the contacts in the switch and control module connectors
- Test the switch with a multimeter
- If necessary, replace the switch or repair the circuit
- Clear error codes and check if B1749 returns
Related codes
FAQ
What does the B1749 code mean?
B1749 is an OBD-II diagnostic trouble code that indicates: Park/Neutral Switch Circuit Failure
What causes a B1749 error code?
The most common causes of B1749 include: Open or short circuit in P/N switch circuit; The park/neutral switch itself is faulty; Oxidation or damage to contacts in connectors; Wiring Harness Problems.
How do I fix a B1749 diagnostic trouble code?
To fix B1749: Check the status of the P/N switch. Inspect the switch circuit for breaks or damage.. Check the contacts in the switch and control module connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1749?
Limited driving only, diagnose soon
How much does it cost to fix B1749?
The estimated repair cost for B1749 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat