AutoCodes – Buick – P159C Buick

P159C Buick 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 Buick 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.

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Code Popularity 362

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 P159C Buick 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 control module sends a 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 ECM detects a fault on the PTO remote engine shutdown switch circuit.

OBDII Code P159C Buick - Power Take-Off Remote Engine Shutdown Switch Circuit - AutoCodes.com — P159C Buick Code - Power Take-Off Remote Engine Shutdown Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P159C Buick?

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 Buick?

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 Buick 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 P159C Buick Code

1. What are the common symptoms of OBDII code P159C in a Buick related to the Power Take-Off Remote Engine Shutdown Switch Circuit?

- Common symptoms include illuminated Check Engine Light, engine stalling, loss of power, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P159C in a Buick?

- Possible causes may include a faulty power take-off remote engine shutdown switch circuit, damaged wiring or connectors, or a malfunctioning control module.

3. How can I diagnose the Power Take-Off Remote Engine Shutdown Switch Circuit issue triggering code P159C in my Buick?

- Diagnosing this issue typically involves using a scan tool to retrieve the trouble code, inspecting the wiring and connectors for damage, and testing the functionality of the remote engine shutdown switch.

4. Can a DIY enthusiast repair OBDII code P159C in a Buick at home?

- While basic troubleshooting like checking connections and fuses can be done at home, diagnosing and repairing complex electrical issues related to this code may require professional assistance.

5. Is it safe to continue driving my Buick with OBDII code P159C present?

- It is not recommended to drive the vehicle with this code active, as it can lead to potential engine issues, stalling, or other safety concerns while driving.

6. Will resetting the trouble code make OBDII code P159C disappear permanently?

- Resetting the code may temporarily clear the Check Engine Light, but if the underlying issue causing code P159C is not addressed, the code is likely to reappear.

7. How much does it typically cost to repair OBDII code P159C in a Buick?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing components, repairing wiring, or reprogramming control modules, which could range from a few hundred to a few thousand dollars.

8. Can extreme weather conditions affect the Power Take-Off Remote Engine Shutdown Switch Circuit in a Buick and trigger code P159C?

- Yes, extreme weather conditions like extreme heat or moisture can potentially damage the circuitry and connectors, leading to issues that trigger code P159C.

9. What steps should I take if I suspect OBDII code P159C in my Buick is related to a faulty control module?

- If a faulty control module is suspected, it is advisable to consult a qualified mechanic or dealership to accurately diagnose the problem and determine the best course of action for repair or replacement.

10. Are there any recalls or technical service bulletins related to OBDII code P159C in Buick vehicles?

- It is recommended to check with Buick dealership or the National Highway Traffic Safety Administration (NHTSA) website for any open recalls or technical service bulletins related to OBDII code P159C in your specific Buick model.