P0850 2016 GMC Sierra Code - Park/Neutral Position Switch Circuit
Quick Answer
The P0850 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates an issue with the Park/Neutral Position (PNP) switch circuit. Common causes include Faulty PNP switch, Damaged wiring or connectors in the PNP switch circuit, Corrosion or debris affecting the PNP switch contacts. 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
- P0850 2016 GMC Sierra indicates Park/Neutral Position Switch Circuit.
- Common causes
- Common causes include Faulty PNP switch, Damaged wiring or connectors in the PNP switch circuit, Corrosion or debris affecting the PNP switch contacts.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0850 2016 GMC Sierra Description
The P0850 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates an issue with the Park/Neutral Position (PNP) switch circuit. The PNP switch, also known as the transmission range sensor, is responsible for detecting the gear position of the transmission. This information is crucial for the vehicle's engine control module (ECM) to determine the appropriate shift points and ensure the vehicle starts only in Park or Neutral.
Common Causes of P0850 2016 GMC Sierra
- Faulty PNP switch
- Damaged wiring or connectors in the PNP switch circuit
- Corrosion or debris affecting the PNP switch contacts
- ECM software issues
- Transmission fluid leaks affecting the PNP switch
Symptoms of P0850 2016 GMC Sierra
- Difficulty starting the vehicle
- Inability to shift gears
- Harsh shifting or erratic transmission behavior
- Cruise control not engaging
- Check Engine Light illuminated
How to Fix P0850 2016 GMC Sierra
- Diagnose the PNP switch circuit using a scan tool to confirm the P0850 code.
- Inspect the wiring and connectors for any damage or corrosion.
- Test the PNP switch for proper operation and signal output.
- Replace the PNP switch if it is found to be faulty.
- Clear the DTC and perform a test drive to ensure the issue is resolved.
Cost to Fix P0850 2016 GMC Sierra
The cost of repairing a P0850 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, the price range for this repair can be between $150 to $400, including parts and labor. Keep in mind that labor rates can vary between different auto repair shops, so it's advisable to check with local shops for a more accurate estimate. Additionally, the cost may increase if additional components need to be replaced or if there are other underlying issues with the transmission system.
Need more information about the P0850 2016 GMC Sierra code?
Need more information on how to fix the P0850 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0850 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0850 2016 GMC Sierra Code
No Frequently Asked Questions about P0850 2016 GMC Sierra Code found.
Discuss the causes and fixes for P0850 2016 GMC Sierra OBDII Code
Code P0850 2016 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.