P0852 2016 GMC Sierra Code - Park/Neutral Position Switch Circuit High Voltage
Quick Answer
The P0852 diagnostic trouble code (DTC) for a 2016 GMC Sierra specifically refers to a Park/Neutral Position (PNP) switch circuit high voltage. Common causes include Faulty Park/Neutral Position (PNP) switch, Corroded or damaged wiring/connectors in the PNP switch circuit, Malfunctioning Powertrain Control Module (PCM). 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 2016 GMC Sierra indicates Park/Neutral Position Switch Circuit High Voltage.
- Common causes
- Common causes include Faulty Park/Neutral Position (PNP) switch, Corroded or damaged wiring/connectors in the PNP switch circuit, Malfunctioning Powertrain Control Module (PCM).
- 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 2016 GMC Sierra Description
The P0852 diagnostic trouble code (DTC) for a 2016 GMC Sierra specifically refers to a Park/Neutral Position (PNP) switch circuit high voltage. This code is triggered when the powertrain control module (PCM) detects that the voltage signal from the PNP switch is higher than the specified range. The PNP switch, also known as the transmission range sensor, is responsible for informing the PCM of the gear position selected by the driver (Park, Reverse, Neutral, Drive, etc.). When the PNP switch circuit has a high voltage, it can affect the accuracy of the gear position signal sent to the PCM, potentially leading to shifting issues, starting problems, or safety concerns.
Common Causes of P0852 2016 GMC Sierra
- Faulty Park/Neutral Position (PNP) switch
- Corroded or damaged wiring/connectors in the PNP switch circuit
- Malfunctioning Powertrain Control Module (PCM)
- Short circuit in the PNP switch circuit
- Poor electrical ground connection
Symptoms of P0852 2016 GMC Sierra
- Check Engine Light illuminated
- Difficulty starting the vehicle
- Inaccurate or erratic shifting patterns
- Vehicle may not start in Park or Neutral
- Loss of power or acceleration
How to Fix P0852 2016 GMC Sierra
- Begin by diagnosing the PNP switch circuit using a digital multimeter to test voltage and continuity.
- Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the PNP switch itself for proper operation using a scan tool. Replace if faulty.
- Clear the DTC and reset the PCM memory to see if the code returns.
- If the issue persists, further diagnostics may be required to identify any underlying problems with the PCM or other related components.
Cost to Fix P0852 2016 GMC Sierra
The cost of repairing a P0852 code on a 2016 GMC Sierra can vary depending on the extent of the issue and the required repairs. 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, with the total repair time varying based on the complexity of the problem. Overall, the total repair cost for addressing a P0852 code could range from $150 to $500 or more, depending on the specific circumstances. It is recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your location and vehicle specifics.
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