P0850 2017 GMC Sierra Code - Park/Neutral Position Switch Circuit
Quick Answer
The P0850 diagnostic trouble code (DTC) in a 2017 GMC Sierra indicates a problem with the Park/Neutral Position (PNP) switch circuit. Common causes include Faulty Park/Neutral Position (PNP) switch, Damaged wiring or connectors in the PNP switch circuit, Corrosion or contamination in the PNP switch 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
- P0850 2017 GMC Sierra indicates Park/Neutral Position Switch Circuit.
- Common causes
- Common causes include Faulty Park/Neutral Position (PNP) switch, Damaged wiring or connectors in the PNP switch circuit, Corrosion or contamination in the PNP switch 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 P0850 2017 GMC Sierra Description
The P0850 diagnostic trouble code (DTC) in a 2017 GMC Sierra indicates a problem 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 when to start the engine, engage the starter, and control various transmission functions.
Common Causes of P0850 2017 GMC Sierra
- Faulty Park/Neutral Position (PNP) switch
- Damaged wiring or connectors in the PNP switch circuit
- Corrosion or contamination in the PNP switch circuit
- ECM software issues affecting PNP switch communication
- Mechanical issues with the transmission range sensor
Symptoms of P0850 2017 GMC Sierra
- Difficulty starting the vehicle
- Engine not cranking when the key is turned
- Inability to shift gears or engage the transmission
- Check Engine Light illuminated on the dashboard
- Transmission stuck in one gear
How to Fix P0850 2017 GMC Sierra
- Diagnose the P0850 DTC using a scan tool to confirm the PNP switch circuit issue.
- Inspect the wiring and connectors in the PNP switch circuit 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 has been resolved.
Cost to Fix P0850 2017 GMC Sierra
The typical repair costs for addressing a P0850 DTC in a 2017 GMC Sierra can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing.
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Frequently Asked Questions about P0850 2017 GMC Sierra Code
1. What does the OBDII code P0850 mean for a 2017 GMC Sierra?
P0850 indicates an issue with the Park/Neutral Position Switch Circuit, which monitors the transmission's gear position to ensure proper vehicle operation.
2. What are the common symptoms of a P0850 code in a 2017 GMC Sierra?
Symptoms may include difficulty starting the engine, the transmission not shifting correctly, or the Check Engine Light turning on.
3. What causes the P0850 code to appear in a 2017 GMC Sierra?
Common causes include a faulty Park/Neutral Position (PNP) switch, damaged wiring or connectors, or issues with the transmission control module.
4. Can I drive my 2017 GMC Sierra with a P0850 code?
It’s not recommended, as the issue may affect transmission function or prevent the vehicle from starting properly.
5. How can a P0850 code be diagnosed in a 2017 GMC Sierra?
A mechanic can use a scan tool to read the code, inspect the PNP switch, test the wiring for continuity, and check for any damaged connectors or transmission module issues.
6. How do I fix the P0850 code on a 2017 GMC Sierra?
Repairs may involve replacing the faulty PNP switch, repairing damaged wiring or connectors, or reprogramming or replacing the transmission control module.
7. How much does it cost to fix a P0850 code in a 2017 GMC Sierra?
Repair costs can vary, but replacing a PNP switch typically costs $150-$300, including parts and labor.
8. Is the P0850 code related to the transmission in a 2017 GMC Sierra?
Yes, the P0850 code is directly related to the transmission, as it involves the Park/Neutral Position Switch, which monitors gear position.
9. Can a dead battery cause a P0850 code in a 2017 GMC Sierra?
While unlikely, electrical issues such as a weak or dead battery can sometimes contribute to communication errors, which might trigger related codes.
10. Should I reset the P0850 code if it appears on my 2017 GMC Sierra?
The code should only be cleared after diagnosing and repairing the underlying issue to prevent further damage or safety concerns.
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