P101B 2017 GMC Sierra Code - Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage
Quick Answer
The diagnostic trouble code P101B for a 2017 GMC Sierra specifically relates to the Glow Plug Control Module Temperature Sensor 2 Circuit registering a low voltage. Common causes include Faulty Glow Plug Control Module Temperature Sensor, Loose or damaged wiring connections, Corrosion on the sensor or wiring. 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 2017 GMC Sierra indicates Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage.
- Common causes
- Common causes include Faulty Glow Plug Control Module Temperature Sensor, Loose or damaged wiring connections, Corrosion on the sensor or wiring.
- 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 P101B 2017 GMC Sierra Description
The diagnostic trouble code P101B for a 2017 GMC Sierra specifically relates to the Glow Plug Control Module Temperature Sensor 2 Circuit registering a low voltage. The Glow Plug Control Module is a critical component in diesel engines that helps to heat up the glow plugs before starting the engine, especially in cold weather conditions. The temperature sensor, in this case, is responsible for monitoring the temperature of the glow plug control module to ensure optimal performance.
Common Causes of P101B 2017 GMC Sierra
- Faulty Glow Plug Control Module Temperature Sensor
- Loose or damaged wiring connections
- Corrosion on the sensor or wiring
- Electrical issues within the circuit
- Faulty Glow Plug Control Module
Symptoms of P101B 2017 GMC Sierra
- Difficulty starting the engine, especially in cold weather
- Reduced fuel efficiency
- Engine misfires or rough idling
- Illumination of the check engine light
- Increased emissions
How to Fix P101B 2017 GMC Sierra
- Begin by diagnosing the root cause of the low voltage in the Glow Plug Control Module Temperature Sensor 2 Circuit using a diagnostic scanner.
- Inspect the wiring and connections associated with the temperature sensor for any signs of damage, corrosion, or looseness.
- Test the temperature sensor itself to determine if it is functioning properly or needs to be replaced.
- If the sensor is faulty, replace it with a new one and ensure proper installation.
- Clear the diagnostic trouble code from the vehicle's computer system and test the vehicle to ensure the issue has been resolved.
Cost to Fix P101B 2017 GMC Sierra
The typical repair costs for addressing the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage issue can range from $150 to $300, including parts and labor. However, it is important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is recommended to check local rates for a more accurate estimate before proceeding with the repair.
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Frequently Asked Questions about P101B 2017 GMC Sierra Code
What does the P101B code mean on a 2017 GMC Sierra?
The P101B code indicates a problem with the Glow Plug Control Module Temperature Sensor 2 Circuit, specifically detecting low voltage in the circuit.
What are the symptoms of a P101B code?
Common symptoms include the check engine light turning on, reduced engine performance, difficulty starting in cold weather, and potential issues with the glow plug system.
What causes the P101B code to appear?
The code can be triggered by a faulty temperature sensor, damaged wiring or connectors, a failed glow plug control module, or corrosion in the circuit.
Can I drive my 2017 GMC Sierra with a P101B code?
While the truck may still be drivable, ignoring the code can lead to issues with cold starts and reduced engine efficiency. It’s best to address the issue promptly.
How do I diagnose the P101B code?
Start by checking the wiring and connections to the temperature sensor for damage or corrosion. Use a multimeter to test the sensor and inspect the glow plug control module for faults.
What tools are needed to fix the P101B code?
Common tools include a multimeter for testing voltage, a code scanner for diagnostics, and basic hand tools for inspecting and replacing components.
How much does it cost to repair a P101B code?
Repair costs vary but typically involve replacing the temperature sensor ($50–$150) or repairing wiring. Labor costs depend on the shop and region.
Can a bad glow plug cause the P101B code?
While the code specifically refers to the temperature sensor circuit, issues with the glow plug system, such as a faulty control module, may indirectly cause the problem.
How do I reset the P101B code after repairs?
Use an OBDII scanner to clear the code after fixing the underlying issue. If the problem persists, the code may reappear.
Is the P101B code common in GMC Sierras?
This code is not overly common but can occur in diesel models where the glow plug system is critical for cold starts. Regular maintenance can help prevent it.
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