P0917
UniversalGear Shift Position Circuit High
High SeverityThe P0917 code indicates that the Powertrain Control Module (PCM) has detected a higher than expected voltage signal in the circuit for the gear shift position sensor. This usually means there's an electrical fault preventing the PCM from accurately knowing which gear the vehicle is in, potentially leading to incorrect gear engagement or transmission control issues.
⚠️ Before You Begin (Safety First)
Always wear appropriate personal protective equipment, such as safety glasses and gloves. Ensure the vehicle is securely parked on a level surface with the parking brake engaged before performing any inspections or repairs. For electrical work, it is always recommended to disconnect the negative battery terminal to prevent accidental shorts or electrical shock.
Common Symptoms
- Check Engine Light illuminated
- Difficulty shifting gears
- Transmission entering limp mode
- Incorrect gear displayed on dashboard
- Vehicle may not start (if the PCM cannot confirm Park/Neutral)
- Harsh shifting
Common Causes
- Faulty gear shift position sensor
- Short to voltage in the gear shift position sensor circuit
- Corroded or loose electrical connectors
- Damaged or chafed wiring
- Faulty Powertrain Control Module (PCM) (rare)
Frequently reported on: General/Universal
Diagnostic Steps
- Inspect the wiring harness and connectors leading to the gear shift position sensor for any signs of damage, corrosion, or looseness.
- Check for any obvious shorts to voltage in the sensor's wiring.
- If possible, test the resistance and voltage output of the gear shift position sensor according to the vehicle's service manual specifications.
- Clear the DTCs and test drive the vehicle to see if the code returns.
- If the sensor is suspected to be faulty and tests confirm it, replace the gear shift position sensor.
- After replacement, clear codes and re-test.
👨🔧 When to Call a Professional
If you have inspected the wiring and the gear shift position sensor and are still unable to diagnose the issue, or if the problem involves internal transmission components, it's best to consult a professional automotive technician. Complex electrical diagnostics or transmission repairs often require specialized tools and expertise.
Commonly Asked Questions
What does 'Gear Shift Position Circuit High' mean?
It means the vehicle's computer (PCM) is receiving a voltage signal from the gear shift position sensor that is higher than what is expected for the current gear, indicating an electrical fault in the sensor or its wiring. This prevents the PCM from knowing the correct gear position.
Can I drive with a P0917 code?
Driving with a P0917 code is not recommended. It can lead to unpredictable shifting, the transmission entering limp mode, or the vehicle not starting, which are safety hazards and can cause further damage to the transmission.
Where is the gear shift position sensor located?
The gear shift position sensor is typically located on the transmission itself, often integrated into the shift linkage assembly, or sometimes near the shifter mechanism within the cabin, depending on the vehicle's design.
How can I test the gear shift position sensor?
You can test the sensor by checking its electrical connectors for corrosion or damage, and by measuring its resistance and voltage output using a multimeter while cycling through the gears. Compare your readings to the specifications found in your vehicle's service manual.
What's the difference between a gear shift position sensor and a neutral safety switch?
While often related or integrated, a gear shift position sensor specifically tells the PCM what gear the vehicle is in, affecting transmission control. A neutral safety switch is primarily a safety device that prevents the engine from starting unless the transmission is in Park or Neutral.