AutoCodes – Generic – P102F

P102F Code - Glow Plug Control Module Temperature Performance

Quick Answer

The Glow Plug Control Module has the ability to perform internal temperature diagnostics for the microprocessor and the glow plug drivers. 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: P102F indicates Glow Plug Control Module Temperature Performance.
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 1,880

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 P102F Description

The Glow Plug Control Module has the ability to perform internal temperature diagnostics for the microprocessor and the glow plug drivers. If no glow plug control module temperature sensors are within 12°C (54°F) of each other for greater than 2 s, a Diagnostic Trouble Code (DTC) will be set. The Glow Plug Control Module will send a message to the Engine Control Module (ECM) to set this DTC.

OBDII Code P102F - Glow Plug Control Module Temperature Performance - AutoCodes.com — P102F Code - Glow Plug Control Module Temperature Performance

What does this mean?

What are the Possible Causes of the DTC P102F?

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 P102F?

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 P102F 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.

Need more information about the P102F code?

Need more information on how to fix the P102F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P102F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P102F Buick — Glow Plug Control Module Temperature Performance
P102F Cadillac — Glow Plug Control Module Temperature Performance
P102F GMC — Glow Plug Control Module Temperature Performance

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 P102F Code

1. What are the common symptoms of OBDII code P102F (Glow Plug Control Module Temperature Performance)?

- Common symptoms include hard starting, rough idling, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P102F?

- Possible causes include a faulty glow plug control module, issues with the glow plugs, wiring problems, or a malfunctioning temperature sensor.

3. How can I diagnose OBDII code P102F?

- Diagnosis typically involves using an OBDII scanner to read the code, checking the glow plug control module and related components for faults, and testing the temperature sensor.

4. Can I still drive my vehicle with OBDII code P102F?

- It is not recommended to drive the vehicle with this code present, as it can lead to performance issues and potential damage to the engine or emissions system.

5. How can I repair OBDII code P102F?

- Repairing this code usually involves replacing the faulty glow plug control module, addressing any issues with the glow plugs or wiring, and resetting the code with an OBDII scanner.

6. Are there any DIY tips for fixing OBDII code P102F?

- While some basic troubleshooting like checking for loose connections or damaged wiring can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

7. Can a faulty temperature sensor cause OBDII code P102F?

- Yes, a malfunctioning temperature sensor can trigger this code by providing incorrect data to the glow plug control module, leading to performance issues.

8. How long does it take to repair OBDII code P102F?

- The repair time can vary based on the specific cause of the code and the complexity of the fix. It may take a few hours to a full day for a mechanic to diagnose and repair the issue.

9. Will OBDII code P102F affect my vehicle's emissions?

- Yes, this code can affect emissions by causing incomplete combustion in the engine, leading to increased emissions of pollutants like hydrocarbons and carbon monoxide.

10. Can extreme weather conditions contribute to triggering OBDII code P102F?

- Yes, extreme cold temperatures can put more strain on the glow plug system, potentially leading to issues with the glow plug control module temperature performance.