OBD Guide
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P1C9D

Gear Shift Position Sensor 2 Circuit

P1C9D is an OBD-II diagnostic trouble code meaning: Gear Shift Position Sensor 2 Circuit. Common causes: open or short circuit in the sensor circuit, poor contact in the sensor connector. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Incorrect display of gear lever position
  • Transmission of the gearbox into emergency mode
  • Difficulty shifting gears
  • Check Engine light comes on
  • Loss of engine power

Causes

  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Shift position sensor malfunction
  • Problems with the transmission control unit
  • Contact corrosion

How to Fix

  1. Check the integrity of wiring and connectors
  2. Measure sensor resistance
  3. Check the sensor signal with an oscilloscope
  4. Replace the shift position sensor if necessary
  5. Update control unit software

Related codes

P1C9CP1C9EP0705

FAQ

What does the P1C9D code mean?

P1C9D is an OBD-II diagnostic trouble code that indicates: Gear Shift Position Sensor 2 Circuit

What causes a P1C9D error code?

The most common causes of P1C9D include: Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Shift position sensor malfunction; Problems with the transmission control unit.

How do I fix a P1C9D diagnostic trouble code?

To fix P1C9D: Check the integrity of wiring and connectors. Measure sensor resistance. Check the sensor signal with an oscilloscope. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1C9D?

Limited driving only, diagnose soon

How much does it cost to fix P1C9D?

The estimated repair cost for P1C9D is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat