P101D 2015 GMC Sierra Code - Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage
Quick Answer
The diagnostic trouble code P101D in a 2015 GMC Sierra indicates a problem with the Glow Plug Control Module Temperature Sensor 3 Circuit, specifically reporting low voltage. Common causes include Faulty glow plug control module temperature sensor, Wiring issues or loose connections in the circuit, Corrosion or damage to the sensor or 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
- P101D 2015 GMC Sierra indicates Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug control module temperature sensor, Wiring issues or loose connections in the circuit, Corrosion or damage to the sensor or 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 P101D 2015 GMC Sierra Description
The diagnostic trouble code P101D in a 2015 GMC Sierra indicates a problem with the Glow Plug Control Module Temperature Sensor 3 Circuit, specifically reporting low voltage. The glow plug control module is a crucial component in diesel engines, responsible for heating the glow plugs to aid in cold starting. The temperature sensor monitors the temperature of the module to ensure proper functioning.
Common Causes of P101D 2015 GMC Sierra
- Faulty glow plug control module temperature sensor
- Wiring issues or loose connections in the circuit
- Corrosion or damage to the sensor or module
- Electrical system malfunctions
- Software or programming issues
Symptoms of P101D 2015 GMC Sierra
- Hard starting, especially in cold weather
- Rough idling or misfiring
- Decreased fuel efficiency
- Increased emissions
- Check Engine Light illuminated
How to Fix P101D 2015 GMC Sierra
- Begin by diagnosing the exact cause of the low voltage in the temperature sensor circuit using a diagnostic scanner.
- Inspect the wiring and connections for any damage, corrosion, or loose connections. Repair or replace as needed.
- Test the glow plug control module temperature sensor for proper function and replace if faulty.
- Clear the trouble code from the vehicle's computer system and test the vehicle to ensure the issue has been resolved.
- If necessary, reprogram the module or update the software to prevent future occurrences of the code.
Cost to Fix P101D 2015 GMC Sierra
The typical repair costs for addressing the P101D code in a 2015 GMC Sierra can vary depending on the specific cause of the issue. Parts for a glow plug control module temperature sensor can range from $50 to $150, while labor costs can add another $100 to $200. Overall, the total repair cost can range from $150 to $350. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.
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Frequently Asked Questions about P101D 2015 GMC Sierra Code
1. What does the OBDII code P101D mean on a 2015 GMC Sierra?
P101D indicates a problem with the Glow Plug Control Module Temperature Sensor 3 Circuit, specifically that it is detecting a low voltage condition.
2. What are the common symptoms of code P101D on a 2015 GMC Sierra?
Symptoms may include difficulty starting the engine in cold weather, reduced engine performance, an illuminated check engine light, or increased exhaust emissions.
3. What causes code P101D to appear on a 2015 GMC Sierra?
Common causes include a faulty glow plug control module temperature sensor, damaged or corroded wiring or connectors in the circuit, or issues with the glow plug control module itself.
4. Can I drive my 2015 GMC Sierra with code P101D?
Driving with this code may be possible, but it’s not recommended as it could lead to poor cold-start performance and potential long-term engine damage.
5. How do I diagnose code P101D on a 2015 GMC Sierra?
Start by inspecting the wiring and connectors for damage or corrosion. Using a multimeter, test the temperature sensor for proper resistance and check for proper voltage at the sensor circuit.
6. How can I fix code P101D on my 2015 GMC Sierra?
Repairs may include replacing the glow plug control module temperature sensor, repairing or replacing damaged wiring, or replacing the glow plug control module if necessary.
7. How much does it cost to repair code P101D on a 2015 GMC Sierra?
The cost depends on the root cause. Replacing a temperature sensor typically costs $50–$150 for parts, while a glow plug control module replacement may cost $300–$500, plus labor.
8. Can a low battery cause code P101D on a 2015 GMC Sierra?
A low or failing battery can cause voltage irregularities, which might trigger this code, so ensure the battery and charging system are in good condition.
9. Is a software update necessary to fix code P101D on a 2015 GMC Sierra?
In rare cases, a software update to the engine control module (ECM) or glow plug control module may be required. Check with a dealership to confirm if this applies to your vehicle.
10. How can I prevent code P101D from recurring on my 2015 GMC Sierra?
Regular maintenance, such as inspecting and cleaning electrical connections and ensuring the glow plug system is functioning properly, can help prevent this code from recurring.
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