P1C99
Gear Shift Position Sensor 1 Circuit
P1C99 is an OBD-II diagnostic trouble code meaning: Gear Shift Position Sensor 1 Circuit. Common causes: open or short circuit in the sensor circuit, gear position sensor malfunction. Estimated repair cost: $17–56.
Symptoms
- Incorrect gear shifting
- Delays when shifting gears
- Check Engine Light Is On
- The transmission goes into emergency mode
- Cannot determine the current program
Causes
- Open or short circuit in the sensor circuit
- Gear position sensor malfunction
- Poor connection or corroded connectors
- Wiring harness damage
- Transmission control module (TCM) malfunction
How to Fix
- Check the integrity of the sensor circuit
- Check sensor connections and connectors
- Check sensor resistance and voltage
- Replace the gear position sensor if necessary
- Check and replace the Transmission Control Module (TCM) if necessary.
Related codes
FAQ
What does the P1C99 code mean?
P1C99 is an OBD-II diagnostic trouble code that indicates: Gear Shift Position Sensor 1 Circuit
What causes a P1C99 error code?
The most common causes of P1C99 include: Open or short circuit in the sensor circuit; Gear position sensor malfunction; Poor connection or corroded connectors; Wiring harness damage.
How do I fix a P1C99 diagnostic trouble code?
To fix P1C99: Check the integrity of the sensor circuit. Check sensor connections and connectors. Check sensor resistance and voltage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1C99?
Yes, but get it checked soon
How much does it cost to fix P1C99?
The estimated repair cost for P1C99 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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