AutoCodes – Buick – P163D Buick

P163D Buick Code - Glow Plug Control Module Secondary Circuit

Quick Answer

The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the voltage and output state of the glow plugs. Common causes include Faulty Glow Plug Control Module, Glow Plug Control Module harness is open or shorted, Glow Plug 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: P163D Buick indicates Glow Plug Control Module Secondary Circuit.
Common causes: Common causes include Faulty Glow Plug Control Module, Glow Plug Control Module harness is open or shorted, Glow Plug 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 301

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 Jul 24, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P163D Buick Description

The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the voltage and output state of the glow plugs. If the GPCM receives a command to turn on the glow plugs, and Ignition 1 Signal voltage is low this code will set. If the GPCM detects voltage on the glow plug circuits while glow plugs are not commanded on this code will set. If the GPCM detects a ground offset of 1.5 volts between the GPCM ground and the glow plug ground circuit this code will be set. The GPCM will send a message to the Engine Control Module (ECM) to set this Diagnostic Trouble Code (DTC).

OBDII Code P163D Buick - Glow Plug Control Module Secondary Circuit - AutoCodes.com — P163D Buick Code - Glow Plug Control Module Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P163D Buick?

Faulty Glow Plug Control Module
Glow Plug Control Module harness is open or shorted
Glow Plug Control Module circuit poor electrical connection

How to Fix the DTC P163D 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 P163D 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 P163D Buick Code

1. What does OBDII code P163D mean on a Buick?

P163D indicates an issue with the Glow Plug Control Module Secondary Circuit, which affects the operation of the glow plugs in a diesel engine.

2. What are the common symptoms of code P163D in a Buick?

Symptoms may include difficulty starting the engine in cold weather, a check engine light, reduced engine performance, or visible smoke during startup.

3. What causes the P163D code to appear on a Buick?

Common causes include faulty glow plugs, a malfunctioning glow plug control module, damaged wiring or connectors, or a failed relay in the circuit.

4. Can I drive my Buick with a P163D code?

While the vehicle may still run, driving with this code can result in poor cold-start performance and increased emissions. It should be addressed promptly.

5. How is the P163D code diagnosed on a Buick?

Diagnosis typically involves using an OBDII scanner, inspecting the glow plug control module and related wiring, and testing the glow plugs and circuit for proper operation.

6. How do I fix the P163D code on my Buick?

Repairs may include replacing faulty glow plugs, repairing or replacing damaged wiring, replacing the glow plug control module, or addressing a failed relay.

7. How much does it cost to repair a P163D code on a Buick?

The cost can vary, but glow plug replacement typically ranges from $100 to $300, while replacing the control module can cost $200 to $500, depending on labor and parts.

8. What tools do I need to troubleshoot the P163D code?

Youâ€™ll need an OBDII scanner, a multimeter to test electrical circuits, and possibly a service manual for your specific Buick model.

9. Can a software update clear the P163D code on a Buick?

In some cases, a software update to the engine control module may resolve the issue, but this depends on whether the code is due to a programming error.

10. How can I prevent the P163D code from reoccurring?

Regular maintenance, including inspecting and replacing glow plugs as needed and ensuring wiring connections are secure and free of corrosion, can help prevent this code.