OBD Guide
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P18C7

Gear Position Sensor Circuit 2 High Voltage

P18C7 is an OBD-II diagnostic trouble code meaning: Gear Position Sensor Circuit 2 High Voltage. Common causes: short circuit in the sensor circuit, gear position sensor malfunction. Estimated repair cost: $17–56.

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

Symptoms

  • Delayed gear shifting
  • The gearbox goes into emergency mode
  • Check Engine light comes on
  • Unstable engine operation
  • Acceleration problems

Causes

  • Short circuit in the sensor circuit
  • Gear position sensor malfunction
  • Wiring harness damage
  • Problems with sensor connectors
  • Malfunction of the transmission control unit

How to Fix

  1. Check the integrity of the sensor circuit
  2. Check sensor connectors for corrosion or damage.
  3. Check the resistance of the gear position sensor
  4. Replace the gear position sensor if necessary
  5. Check and replace wiring harness if necessary

Related codes

P18C6P18C8P18C9

FAQ

What does the P18C7 code mean?

P18C7 is an OBD-II diagnostic trouble code that indicates: Gear Position Sensor Circuit 2 High Voltage

What causes a P18C7 error code?

The most common causes of P18C7 include: Short circuit in the sensor circuit; Gear position sensor malfunction; Wiring harness damage; Problems with sensor connectors.

How do I fix a P18C7 diagnostic trouble code?

To fix P18C7: Check the integrity of the sensor circuit. Check sensor connectors for corrosion or damage.. Check the resistance of the gear position sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P18C7?

Limited driving only, diagnose soon

How much does it cost to fix P18C7?

The estimated repair cost for P18C7 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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