P0851 2014 Chevrolet Silverado Code - Park/Neutral Position Switch Circuit Low Voltage
Quick Answer
The P0851 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado refers to the Park/Neutral Position (PNP) switch circuit having low voltage. Common causes include Faulty Park/Neutral Position (PNP) switch, Damaged wiring or connectors in the PNP switch circuit, Corrosion or poor connections in the circuit. 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
- P0851 2014 Chevrolet Silverado indicates Park/Neutral Position Switch Circuit Low Voltage.
- Common causes
- Common causes include Faulty Park/Neutral Position (PNP) switch, Damaged wiring or connectors in the PNP switch circuit, Corrosion or poor connections in the circuit.
- 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 P0851 2014 Chevrolet Silverado Description
The P0851 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado refers to the Park/Neutral Position (PNP) switch circuit having low voltage. The PNP switch, also known as the transmission range sensor, is a crucial component that informs the vehicle's computer about the gear position selected by the driver. When the PNP switch circuit detects low voltage, it indicates a potential issue with the switch's functionality or the circuit itself. This can lead to incorrect gear selection, starting issues, and even safety concerns if the vehicle is not accurately registering its gear position.
Common Causes of P0851 2014 Chevrolet Silverado
- Faulty Park/Neutral Position (PNP) switch
- Damaged wiring or connectors in the PNP switch circuit
- Corrosion or poor connections in the circuit
- ECM software issues
- Transmission fluid leaks affecting the PNP switch
Symptoms of P0851 2014 Chevrolet Silverado
- Difficulty starting the vehicle
- Inability to shift gears smoothly
- Incorrect gear display on the dashboard
- Vehicle stalling while driving
- Check Engine Light illuminated on the dashboard
How to Fix P0851 2014 Chevrolet Silverado
- Begin by diagnosing the PNP switch circuit using a multimeter to test for voltage irregularities.
- Inspect the wiring and connectors for any signs of damage, corrosion, or loose connections.
- Replace the PNP switch if it is found to be faulty, ensuring proper alignment and connection.
- Clear the DTC from the ECM using a scan tool and perform a road test to verify the repair.
- If the issue persists, further diagnostics may be necessary to identify any underlying problems with the transmission or ECM.
Cost to Fix P0851 2014 Chevrolet Silverado
The typical repair costs for addressing a P0851 code on a 2014 Chevrolet Silverado can range from $150 to $400, including parts and labor. However, it's important to note that actual costs may vary depending on the specific diagnosis time and labor rates at auto repair shops. Rates can fluctuate based on factors such as location, vehicle make and model, and engine type. It's recommended to inquire with local auto repair shops for a more accurate estimate based on your individual circumstances.
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