AutoCodes – GMC – P159D 2016 GMC Sierra

P159D 2016 GMC Sierra Code - Power Take-Off Remote Mode 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: P159D 2016 GMC Sierra indicates Power Take-Off Remote Mode 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.

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Code Popularity 175

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P159D 2016 GMC Sierra Description

The Power Take-Off (PTO) is an upfitter integrated system that allows the user to create an auxiliary power source. The PTO system specifically controls engine speed to values higher than normal base idle, PTO load relay engagement, and remote starting and shutdown of the engine. When the operator requests PTO using either the PTO switch or PTO remote, the engine RPM will increase to a default standby speed. The Engine Control Module (ECM) converts the data from the engine speed sensor to a 2 pulses/engine revolution signal. When PTO is engaged, the Power Take-Off Module (PTOM) sends a GMLAN serial data message to the ECM requesting engine speeds, in response to signals from the PTO switch or remote.
The Diagnostic Trouble Code (DTC) will be set when the Power Take-Off Control Module detects a signal mismatch between the remote engine shut-off signal and the PTO engine shutdown signal.

OBDII Code P159D 2016 GMC Sierra - Power Take-Off Remote Mode Switch Circuit - AutoCodes.com — P159D 2016 GMC Sierra Code - Power Take-Off Remote Mode Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P159D 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

How to Fix the DTC P159D 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 P159D 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P159D 2016 GMC Sierra Code

1. What does the OBDII code P159D mean on a 2016 GMC Sierra?

The P159D code indicates a problem with the Power Take-Off (PTO) Remote Mode Switch Circuit, which is responsible for enabling and controlling the PTO system.

2. What are the common symptoms of code P159D on a 2016 GMC Sierra?

Symptoms may include the PTO system not engaging, a check engine light, or a message on the dashboard indicating a PTO system malfunction.

3. What causes the P159D code to appear on a GMC Sierra?

Common causes include a faulty PTO remote mode switch, damaged wiring or connectors in the switch circuit, or an issue with the powertrain control module (PCM).

4. Can I still drive my 2016 GMC Sierra with the P159D code?

Yes, you can typically drive the truck, but the PTO system may not function properly, which could impact operations like powering auxiliary equipment.

5. How do I diagnose the P159D code on my GMC Sierra?

Start by inspecting the PTO remote mode switch, its wiring, and connectors for damage or corrosion. Use a multimeter to check for proper voltage and continuity in the circuit.

6. How do I fix the P159D code on a 2016 GMC Sierra?

Repairs may involve replacing the PTO remote mode switch, repairing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

7. What tools are needed to troubleshoot the P159D code?

Youâ€™ll need an OBDII scanner, a multimeter for electrical testing, and possibly wiring diagrams for the PTO system to assist in diagnostics.

8. Can a bad PTO remote mode switch cause the P159D code?

Yes, a faulty or defective PTO remote mode switch is one of the most common causes of this code.

9. What should I check first when troubleshooting the P159D code?

Begin by visually inspecting the PTO remote mode switch and its wiring harness for signs of damage, wear, or loose connections.

10. How much does it cost to fix the P159D code on a 2016 GMC Sierra?

Repair costs vary depending on the exact issue but can range from $50 for a new switch to $500 or more if extensive wiring repairs or PCM replacement is required.