P101C 2017 GMC Sierra Code - Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage
Quick Answer
The diagnostic trouble code P101C for a 2017 GMC Sierra relates to the Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage. Common causes include Faulty glow plug control module temperature sensor, Wiring or connection issues in the temperature sensor circuit, Corrosion or damage to the sensor or its connectors. 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
- P101C 2017 GMC Sierra indicates Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug control module temperature sensor, Wiring or connection issues in the temperature sensor circuit, Corrosion or damage to the sensor or its connectors.
- 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 P101C 2017 GMC Sierra Description
The diagnostic trouble code P101C for a 2017 GMC Sierra relates to the Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage. This code indicates that there is a high voltage condition detected in the temperature sensor circuit of the glow plug control module. The glow plug control module is responsible for monitoring and controlling the glow plugs, which are used to preheat the combustion chambers in diesel engines for easier starting in cold weather conditions.
Common Causes of P101C 2017 GMC Sierra
- Faulty glow plug control module temperature sensor.
- Wiring or connection issues in the temperature sensor circuit.
- Corrosion or damage to the sensor or its connectors.
- Electrical issues such as a short circuit or high resistance in the circuit.
- Faulty engine control module (ECM) or glow plug control module.
Symptoms of P101C 2017 GMC Sierra
- Hard starting or extended cranking time when trying to start the engine.
- Illumination of the check engine light on the dashboard.
- Reduced engine performance and power.
- Excessive smoke or emissions from the exhaust.
- Poor fuel efficiency.
How to Fix P101C 2017 GMC Sierra
- Begin by inspecting the glow plug control module temperature sensor and its wiring for any visible damage or corrosion.
- Test the temperature sensor using a multimeter to check for proper resistance values and voltage readings.
- Replace the temperature sensor if it is found to be faulty or out of specification.
- Clear the diagnostic trouble codes from the vehicle's ECM using a scan tool.
- Test the vehicle to ensure that the issue has been resolved and that the glow plug system is functioning correctly.
Cost to Fix P101C 2017 GMC Sierra
The cost of repairing a Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage issue can vary depending on the specific cause of the problem and the labor rates in your area. Generally, the cost of replacing the temperature sensor itself can range from $50 to $150, while the labor cost for diagnostics and repair can add another $100 to $200. Overall, you can expect to pay anywhere from $150 to $350 for resolving this particular issue. However, it's advisable to obtain quotes from local auto repair shops to get a more accurate estimate based on your vehicle's make and model.
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Frequently Asked Questions about P101C 2017 GMC Sierra Code
What does the OBDII code P101C mean on a 2017 GMC Sierra?
Code P101C indicates an issue with the Glow Plug Control Module (GPCM) Temperature Sensor 2 Circuit, specifically detecting a high voltage condition.
What are the common symptoms of a P101C code?
Symptoms may include the check engine light turning on, poor cold-start performance, reduced engine efficiency, or the engine running rough in cold conditions.
What causes the P101C code to appear?
Common causes include a faulty temperature sensor, damaged or corroded wiring, loose electrical connections, or an issue within the Glow Plug Control Module itself.
Can I drive my 2017 GMC Sierra with a P101C code?
While the vehicle may still be drivable, ignoring the issue can lead to poor performance, especially in cold weather, and could cause further damage to the Glow Plug Control Module system.
How do you diagnose a P101C code?
Diagnosis typically involves using an OBDII scanner to confirm the code, inspecting the wiring and connections to the temperature sensor, and testing the sensor's voltage and resistance with a multimeter.
How can I fix the P101C code?
Repairs may include replacing the faulty temperature sensor, repairing or replacing damaged wiring, cleaning corroded connections, or replacing the Glow Plug Control Module if necessary.
What tools are needed to troubleshoot a P101C code?
Basic tools include an OBDII scanner, a multimeter for voltage and resistance testing, and potentially a wiring diagram for the Glow Plug Control Module system.
How much does it cost to repair a P101C code?
Costs can vary depending on the issue, but replacing a temperature sensor typically costs $50–$150, while more extensive repairs like replacing the Glow Plug Control Module can cost $300–$600.
Can a P101C code cause long-term damage?
If left unaddressed, the code could lead to decreased engine performance and additional strain on the Glow Plug Control Module, potentially resulting in higher repair costs.
Does the P101C code affect emissions?
While it primarily affects cold-start performance, prolonged issues with the glow plug system could indirectly impact emissions by causing inefficient combustion.
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