AutoCodes – Generic – P101E

P101E Code - Glow Plug Control Module Temperature Sensor 3 Circuit High Voltage

Quick Answer

The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the temperature sensor circuit. Common causes include Faulty Glow Plug Control Module (GPCM), 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: P101E indicates Glow Plug Control Module Temperature Sensor 3 Circuit High Voltage.
Common causes: Common causes include Faulty Glow Plug Control Module (GPCM), 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 988

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 Oct 01, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P101E Description

The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the temperature sensor circuit. The GPCM monitors the internal temperature sensor voltage and if the voltage is less than 0.21 V or greater than 4.94 V. The GPCM will send a message to the Engine Control Module (ECM) to set the appropriate Diagnostic Trouble Code (DTC). A DTC is detected when one of the GPCM temperature sensors voltage falls outside the calibrated threshold for greater than 1.3 s.

OBDII Code P101E - Glow Plug Control Module Temperature Sensor 3 Circuit High Voltage - AutoCodes.com — P101E Code - Glow Plug Control Module Temperature Sensor 3 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P101E?

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

How to Fix the DTC P101E?

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 P101E 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 P101E code?

Need more information on how to fix the P101E code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P101E code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P101E Buick — Glow Plug Control Module Temperature Sensor 3 Circuit High Voltage
P101E Cadillac — Glow Plug Control Module Temperature Sensor 3 Circuit High Voltage
P101E Chevrolet — Glow Plug Control Module Temperature Sensor 3 Circuit High Voltage
P101E GMC — Glow Plug Control Module Temperature Sensor 3 Circuit High Voltage

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 P101E Code

1. What does the OBDII code P101E mean?

The code P101E indicates a high-voltage issue with the Glow Plug Control Module Temperature Sensor 3 circuit, which monitors engine temperature for efficient operation in diesel engines.

2. What are the symptoms of a P101E code?

Common symptoms include difficulty starting the engine in cold weather, reduced engine performance, and the check engine light being illuminated.

3. What causes the P101E code?

Potential causes include a faulty temperature sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning glow plug control module.

4. Can I drive with a P101E code?

While you can drive with this code, it may lead to poor cold starts and reduced fuel efficiency. Prolonged driving without repairs could cause further engine issues.

5. How is the P101E code diagnosed?

A technician will use a scan tool to confirm the code, inspect the wiring and connectors, test the temperature sensor, and check the glow plug control module for faults.

6. How do I fix the P101E code?

Repairs may involve replacing the temperature sensor, repairing damaged wiring or connectors, or replacing the glow plug control module if it's defective.

7. How much does it cost to fix a P101E code?

Repair costs vary, but replacing the temperature sensor typically costs $100â€“$300, depending on labor rates and the vehicle model.

8. Can a P101E code cause engine damage?

While the code itself may not directly cause damage, ignoring it could lead to inefficient operation and potential long-term engine strain.

9. What tools are needed to fix a P101E code?

Basic tools include a multimeter for testing voltage, a scan tool for reading codes, and possibly replacement parts like a temperature sensor or wiring.

10. Can I repair the P101E code myself?

If you have experience with automotive diagnostics and repairs, you can attempt to fix it by inspecting the wiring and replacing the sensor. For complex issues, professional help is recommended.