AutoCodes – Chevrolet – P101B 2016 Chevrolet Silverado

P101B 2016 Chevrolet Silverado Code - Glow Plug Control Module Temperature Sensor 2 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: P101B 2016 Chevrolet Silverado indicates Glow Plug Control Module Temperature Sensor 2 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 198

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 P101B 2016 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 P101B 2016 Chevrolet Silverado - Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage - AutoCodes.com — P101B 2016 Chevrolet Silverado Code - Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P101B 2016 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 P101B 2016 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 P101B 2016 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 P101B 2016 Chevrolet Silverado code?

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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 P101B 2016 Chevrolet Silverado Code

What does the OBDII code P101B mean on a 2016 Chevrolet Silverado?

P101B indicates a problem with the Glow Plug Control Module Temperature Sensor 2 Circuit, specifically low voltage being detected.

What are the common symptoms of a P101B code?

Symptoms may include difficulty starting in cold weather, reduced engine performance, a check engine light, and potential pre-glow system errors.

What causes the P101B code to appear?

Common causes include a faulty Glow Plug Control Module, damaged wiring or connectors in the sensor circuit, a failed Temperature Sensor 2, or corrosion in electrical connections.

How can I diagnose the P101B code?

Start by inspecting the wiring and connectors for damage or corrosion. Use a multimeter to check sensor voltage and continuity. Scan live data with an OBDII scanner to confirm sensor operation.

Can I still drive my Silverado with the P101B code?

While the truck may still run, driving with this code can lead to poor cold starts and potential damage to the glow plug system. It's best to address the issue promptly.

How do I fix the P101B code?

Repairs may include replacing the Temperature Sensor 2, repairing or replacing damaged wiring, cleaning corroded connectors, or replacing the Glow Plug Control Module if necessary.

What tools are needed to troubleshoot the P101B code?

Youâ€™ll need an OBDII scanner, a multimeter to test voltage and continuity, and potentially basic hand tools for accessing the module and wiring.

Is the P101B code covered under warranty for a 2016 Silverado?

This depends on your vehicle's warranty terms. Emissions-related components may be covered under the Federal Emissions Warranty, but consult your dealer for details.

How much does it cost to fix the P101B code?

Repair costs vary depending on the issue. Replacing a temperature sensor could cost $50-$150, while a Glow Plug Control Module replacement may cost $200-$500 including labor.

Can a software issue cause the P101B code?

While rare, a software glitch in the engine control module (ECM) or Glow Plug Control Module could contribute to this code. A software update may be necessary in some cases.