P159C 2016 GMC Sierra Code - Power Take-Off Remote Engine Shutdown Switch Circuit
Quick Answer
The Power Take-Off (PTO) is an upfitter integrated system that allows the user to create an auxiliary power source. Common causes include Faulty Power Take-Off (PTO) Control Module, Power Take-Off Control Module harness is open or shorted, Power Take-Off Control Module circuit poor electrical connection. 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
- P159C 2016 GMC Sierra indicates Power Take-Off Remote Engine Shutdown Switch Circuit.
- Common causes
- Common causes include Faulty Power Take-Off (PTO) Control Module, Power Take-Off Control Module harness is open or shorted, Power Take-Off Control Module circuit poor electrical connection.
- 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.
Code P159C 2016 GMC Sierra Description
The Diagnostic Trouble Code (DTC) will be set when the ECM detects a fault on the PTO remote engine shutdown switch circuit.
What are the Possible Causes of the DTC P159C 2016 GMC Sierra?
- Faulty Power Take-Off (PTO) Control Module
- Power Take-Off Control Module harness is open or shorted
- Power Take-Off Control Module circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P159C 2016 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P159C 2016 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P159C 2016 GMC Sierra Code
1. What does the OBDII code P159C mean on a 2016 GMC Sierra?
P159C refers to an issue with the Power Take-Off (PTO) Remote Engine Shutdown Switch Circuit, indicating a fault in the system responsible for remotely shutting down the engine during PTO operation.
2. What are the common symptoms of the P159C code?
Symptoms may include the inability to use the PTO system, the engine not shutting down remotely as intended, the check engine light illuminating, or stored diagnostic trouble codes in the system.
3. What causes the P159C code to appear?
Common causes include a faulty PTO remote engine shutdown switch, damaged wiring or connectors in the switch circuit, or a failure in the Powertrain Control Module (PCM).
4. Can I still drive my 2016 GMC Sierra with the P159C code?
Yes, the vehicle can usually still be driven, but the PTO functionality may be compromised. It’s best to address the issue to avoid further problems.
5. How can I diagnose the P159C code?
Diagnosis involves inspecting the PTO remote engine shutdown switch, checking for damaged or disconnected wiring, and using a scan tool to monitor the circuit’s signal and test the PCM.
6. How do I fix the P159C code?
Repairs may include replacing the faulty PTO remote engine shutdown switch, repairing or replacing damaged wiring or connectors, or reprogramming/updating the PCM if necessary.
7. What tools are needed to troubleshoot the P159C code?
You’ll need an OBDII scan tool, a multimeter to test electrical connections, and wiring diagrams for the PTO system on the 2016 GMC Sierra.
8. Can a bad PCM cause the P159C code?
Yes, although less common, a malfunctioning PCM can cause the P159C code if it fails to process the PTO remote engine shutdown signals correctly.
9. Is the P159C code specific to the GMC Sierra?
No, the P159C code can also appear in other GM vehicles equipped with PTO systems, but the troubleshooting and repair process may vary slightly.
10. How much does it cost to repair the P159C code?
The cost depends on the root cause. Replacing a PTO remote engine shutdown switch typically costs $50–$200 for parts and labor, while PCM repairs or updates may range from $150 to $1,000.
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