P0852 2018 GMC Sierra Code - Park/Neutral Position Switch Circuit High Voltage
Quick Answer
The P0852 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the Park/Neutral Position (PNP) switch circuit having a high voltage. Common causes include Faulty Park/Neutral Position (PNP) switch, Wiring issues in the PNP switch circuit, Corrosion or damage to electrical connectors. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0852 2018 GMC Sierra indicates Park/Neutral Position Switch Circuit High Voltage.
- Common causes
- Common causes include Faulty Park/Neutral Position (PNP) switch, Wiring issues in the PNP switch circuit, Corrosion or damage to electrical connectors.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0852 2018 GMC Sierra Description
The P0852 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the Park/Neutral Position (PNP) switch circuit having a high voltage. The PNP switch, also known as the transmission range sensor, is a critical component that informs the vehicle's computer system about the gear position selected by the driver. This information is crucial for various systems in the vehicle, such as the transmission control module, engine control module, and cruise control system, to operate correctly.
Common Causes of P0852 2018 GMC Sierra
- Faulty Park/Neutral Position (PNP) switch
- Wiring issues in the PNP switch circuit
- Corrosion or damage to electrical connectors
- Malfunctioning transmission control module
- Issues with the engine control module
Symptoms of P0852 2018 GMC Sierra
- Difficulty starting the vehicle
- Inability to shift gears smoothly
- Cruise control not engaging
- Check Engine Light illuminated on the dashboard
How to Fix P0852 2018 GMC Sierra
- Begin by diagnosing the specific cause of the high voltage in the PNP switch circuit using a diagnostic scanner.
- Inspect the wiring and connectors in the PNP switch circuit for any damage or corrosion. Repair or replace as necessary.
- Test the PNP switch for proper operation and replace if found to be faulty.
- Check the transmission control module and engine control module for any malfunctions and address any issues detected.
- Clear the DTC from the vehicle's computer system and test the vehicle to ensure that the problem has been resolved.
Cost to Fix P0852 2018 GMC Sierra
The typical repair costs for addressing a P0852 code in a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts such as a new PNP switch or wiring harness can range from $50 to $200. Labor costs at auto repair shops typically range from $80 to $150 per hour. The total cost of repairs for this issue could range from $150 to $500, depending on the extent of the problem and the time required for diagnosis and repair. It is advisable to consult with a qualified mechanic or auto repair shop to obtain a more accurate estimate based on the specific circumstances of the vehicle.
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