AutoCodesBuick – P101F Buick

P101F Buick Code - Glow Plug Control Module Temperature Sensor 1 Not Plausible

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
P101F Buick indicates Glow Plug Control Module Temperature Sensor 1 Not Plausible.
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 319
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 24, 2021
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Code P101F Buick Description

The Glow Plug Control Module has the ability to perform internal temperature diagnostics for the microprocessor and the glow plug drivers. If the Glow Plug Control Module temperature sensor 1 is not within 12°C (54°F) of Glow Plug Control Module temperature sensor 2 and Glow Plug Control Module Temperature Sensor 3; and the difference between Glow Plug Control Module Temperature Sensor 2 and Glow plug control module Temperature Sensor 3 is less than 12°C (54°F) 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 P101F Buick - Glow Plug Control Module Temperature Sensor 1 Not Plausible - AutoCodes.com
P101F Buick Code - Glow Plug Control Module Temperature Sensor 1 Not Plausible

What are the Possible Causes of the DTC P101F 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 P101F 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 P101F 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 P101F Buick Code

1. What does the OBDII code P101F mean for a Buick?

P101F indicates an issue with the Glow Plug Control Module Temperature Sensor 1, where its readings are not plausible or within the expected range.

2. What are common symptoms of a P101F code on a Buick?

Symptoms may include difficulty starting the engine, especially in cold weather, reduced engine performance, and the check engine light turning on.

3. What causes the P101F code in a Buick?

Common causes include a faulty glow plug control module, a damaged or malfunctioning temperature sensor, wiring issues, or poor electrical connections.

4. Can I drive my Buick with a P101F code?

While the vehicle may still operate, driving with a P101F code can lead to reduced performance and increased emissions, so it’s best to address the issue promptly.

5. How do I diagnose the P101F code on my Buick?

Start by scanning for additional codes, inspecting the glow plug control module and temperature sensor, checking for damaged wiring, and verifying sensor readings with a diagnostic tool.

6. How is the P101F code fixed on a Buick?

Repairs may involve replacing the faulty temperature sensor, repairing damaged wiring, cleaning electrical connections, or replacing the glow plug control module if necessary.

7. What tools are needed to fix the P101F code?

You’ll need an OBDII scanner, a multimeter for testing electrical connections, and possibly tools to replace the sensor or module.

8. Does the P101F code affect fuel efficiency?

Yes, it can reduce fuel efficiency by affecting the engine’s combustion process, especially during cold starts.

9. How much does it cost to fix a P101F code on a Buick?

Repair costs vary, but replacing the temperature sensor typically costs $100–$250, including parts and labor. If the glow plug control module is faulty, the cost may increase.

10. Can a P101F code be cleared without repairs?

Clearing the code without addressing the underlying issue may temporarily turn off the check engine light, but the problem will likely return.

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