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P159D Cadillac 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 Cadillac 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 398

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 Cadillac 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 Cadillac - Power Take-Off Remote Mode Switch Circuit - AutoCodes.com — P159D Cadillac Code - Power Take-Off Remote Mode Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P159D Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What are the common symptoms of OBDII code P159D in a Cadillac related to the Power Take-Off Remote Mode Switch Circuit?

- Common symptoms may include difficulty engaging the power take-off (PTO) function, poor performance of the PTO system, and potential illumination of the check engine light.

2. What are the possible causes of OBDII code P159D in a Cadillac?

- Potential causes of this code include a faulty remote mode switch, wiring issues in the circuit, damaged connectors, or a malfunctioning PTO control module.

3. How can I diagnose the Power Take-Off Remote Mode Switch Circuit issue causing code P159D in my Cadillac?

- To diagnose the issue, you can use an OBDII scanner to read the code, inspect the wiring and connectors for any visible damage, and test the remote mode switch for proper functionality.

4. Can I continue driving my Cadillac if OBDII code P159D related to the Power Take-Off Remote Mode Switch Circuit is present?

- It is not recommended to continue driving the vehicle with this code present, as it can affect the operation of the power take-off system and potentially lead to further damage.

5. What are the repair options for fixing OBDII code P159D in a Cadillac?

- Repair options may include replacing the remote mode switch, repairing or replacing damaged wiring and connectors, or addressing any issues with the PTO control module.

6. Is it possible to reset OBDII code P159D in a Cadillac without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is important to address the root cause of the problem to prevent the code from reoccurring.

7. Are there any preventive measures to avoid OBDII code P159D in a Cadillac?

- Regular maintenance checks, including inspecting the PTO system components and wiring, can help prevent issues that may trigger this code.

8. How much does it typically cost to repair OBDII code P159D in a Cadillac?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve parts and labor expenses for replacing components or repairing the wiring.

9. Can a DIY enthusiast fix OBDII code P159D related to the Power Take-Off Remote Mode Switch Circuit in a Cadillac?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this issue themselves, but caution is advised due to the complexity of the PTO system.

10. Will OBDII code P159D in a Cadillac affect the vehicle's overall performance?

- While the code itself may not directly impact the vehicle's performance, it can lead to operational issues with the power take-off system, affecting functionality in certain driving situations.