P101B 2016 GMC Sierra Code - Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage
Quick Answer
The P101B diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage. Common causes include Malfunctioning temperature sensor in the glow plug control module, Wiring issues or electrical connections related to the temperature sensor, Faulty glow plug control module. 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 GMC Sierra indicates Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage.
- Common causes
- Common causes include Malfunctioning temperature sensor in the glow plug control module, Wiring issues or electrical connections related to the temperature sensor, Faulty glow plug control module.
- 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 2016 GMC Sierra Description
The P101B diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage. This code indicates that the temperature sensor in the glow plug control module is detecting a lower voltage than expected. The glow plug control module is responsible for regulating the glow plugs in a diesel engine, which are used to heat the combustion chamber for easier starting in cold conditions. The temperature sensor helps the module determine when to activate the glow plugs based on the engine's temperature.
Common Causes of P101B 2016 GMC Sierra
- Malfunctioning temperature sensor in the glow plug control module.
- Wiring issues or electrical connections related to the temperature sensor.
- Faulty glow plug control module.
- Corrosion or damage to the sensor or module components.
- Environmental factors such as extreme temperatures affecting sensor performance.
Symptoms of P101B 2016 GMC Sierra
- Difficulty starting the vehicle, especially in cold weather.
- Reduced fuel efficiency due to inefficient combustion.
- Rough idling or engine misfires.
- Illumination of the check engine light on the dashboard.
- Decreased engine performance, particularly during cold starts.
How to Fix P101B 2016 GMC Sierra
- Begin by diagnosing the specific cause of the low voltage in the temperature sensor using a diagnostic scanner.
- Inspect the wiring and electrical connections related to the sensor for any damage or corrosion.
- Test the temperature sensor's functionality and replace it if necessary.
- If the sensor is functioning correctly, check the glow plug control module for any faults and replace if needed.
- Clear the DTC from the vehicle's computer system and test the glow plug system to ensure proper operation.
Cost to Fix P101B 2016 GMC Sierra
The typical repair costs for addressing a P101B code in a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a temperature sensor or repairing wiring connections may cost between $150 to $300, including parts and labor. If the glow plug control module needs replacement, the cost could range from $300 to $600. Keep in mind that these estimates are approximate, and actual costs may vary based on the location, vehicle make and model, and labor rates at the auto repair shop. It's recommended to obtain a detailed quote from a trusted mechanic before proceeding with the repair.
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Frequently Asked Questions about P101B 2016 GMC Sierra Code
What does the OBDII code P101B mean on a 2016 GMC Sierra?
P101B refers to a low voltage issue in the Glow Plug Control Module Temperature Sensor 2 circuit, indicating a problem with the sensor or its wiring.
What are the common symptoms of code P101B?
Symptoms may include the check engine light turning on, difficulty starting in cold weather, reduced engine performance, or erratic idling.
What causes the P101B code to appear?
Common causes include a faulty Glow Plug Control Module Temperature Sensor 2, damaged wiring or connectors, or corrosion in the circuit.
Can a bad glow plug cause the P101B code?
No, the P101B code specifically relates to the temperature sensor circuit, not the glow plugs themselves.
How do you diagnose a P101B code?
Diagnosis involves checking for damaged wiring, testing the Glow Plug Control Module Temperature Sensor 2 with a multimeter, and inspecting for corrosion or loose connections.
Can I still drive with a P101B code?
While the vehicle may still run, driving with this code can lead to performance issues, especially in cold weather, and should be addressed promptly.
How do you fix the P101B code?
Repairs may include replacing the Glow Plug Control Module Temperature Sensor 2, repairing damaged wiring, cleaning corroded connections, or updating the engine control module (ECM) software if needed.
What is the cost to repair a P101B code?
Repair costs vary, but replacing the sensor typically costs $100-$300, depending on parts and labor rates.
Is P101B specific to diesel engines?
Yes, this code is specific to diesel engines because it pertains to the glow plug system, which is not used in gasoline engines.
Can a weak battery trigger the P101B code?
A weak battery could contribute to low voltage issues, but it’s more likely to be a problem with the sensor or its circuit. Always test the battery if low voltage concerns arise.
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