AutoCodes – Chevrolet – P101D 2014 Chevrolet Silverado

P101D 2014 Chevrolet Silverado Code - Glow Plug Control Module Temperature Sensor 3 Circuit Low 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: P101D 2014 Chevrolet Silverado indicates Glow Plug Control Module Temperature Sensor 3 Circuit Low 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 279

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P101D 2014 Chevrolet Silverado 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 P101D 2014 Chevrolet Silverado - Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage - AutoCodes.com — P101D 2014 Chevrolet Silverado Code - Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P101D 2014 Chevrolet Silverado?

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 P101D 2014 Chevrolet Silverado?

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 P101D 2014 Chevrolet Silverado 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 P101D 2014 Chevrolet Silverado code?

Need more information on how to fix the P101D 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P101D 2014 Chevrolet Silverado Code

What does the OBDII code P101D mean on a 2014 Chevrolet Silverado?

P101D indicates that the Glow Plug Control Module (GPCM) has detected a low voltage issue in the circuit for Temperature Sensor 3.

What are the common symptoms of code P101D?

Common symptoms include the check engine light turning on, potential difficulty starting the engine in cold weather, or reduced engine performance.

What causes the P101D code to appear?

Common causes include a faulty Temperature Sensor 3, damaged wiring or connectors in the sensor circuit, or a malfunctioning Glow Plug Control Module.

Can I drive my 2014 Silverado with the P101D code?

While the truck may still run, itâ€™s not recommended to ignore this code as it may lead to starting difficulties or further damage, especially in cold weather.

How do I diagnose the P101D code?

Start by inspecting the wiring and connectors for damage or corrosion, test the Temperature Sensor 3 for proper function, and ensure the Glow Plug Control Module is operating correctly.

What tools are needed to troubleshoot the P101D code?

A scan tool or code reader, a multimeter, and possibly a wiring diagram for the Glow Plug Control Module circuit are needed for diagnosis.

How can the P101D code be fixed?

Repairs may include replacing the Temperature Sensor 3, repairing or replacing damaged wiring, or replacing the Glow Plug Control Module if necessary.

What is the Glow Plug Control Module's role in the P101D code?

The Glow Plug Control Module monitors and controls the glow plugs and temperature sensors to help the engine start and operate efficiently, especially in cold conditions.

How much does it cost to repair the P101D code?

Costs vary depending on the issue. Replacing a temperature sensor may cost $50-$150, while replacing the Glow Plug Control Module could cost $300-$600, including labor.

Can a low battery cause the P101D code?

Yes, a weak or discharged battery can cause voltage-related faults, including P101D. Ensure the battery and charging system are in good condition.