P101D 2018 GMC Sierra Code - Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage
Quick Answer
The P101D code for a 2018 GMC Sierra indicates a problem with the Glow Plug Control Module Temperature Sensor 3 Circuit having low voltage. Common causes include Damaged wiring or connectors in the circuit, Faulty temperature sensor, Malfunctioning 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
- P101D 2018 GMC Sierra indicates Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage.
- Common causes
- Common causes include Damaged wiring or connectors in the circuit, Faulty temperature sensor, Malfunctioning 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P101D 2018 GMC Sierra Description
The P101D code for a 2018 GMC Sierra indicates a problem with the Glow Plug Control Module Temperature Sensor 3 Circuit having low voltage. The glow plug control module is a vital component in diesel engines, as it helps to warm up the glow plugs before starting the engine. The temperature sensor is responsible for measuring the temperature of the module to ensure it operates within the specified range.
Common Causes of P101D 2018 GMC Sierra
- Damaged wiring or connectors in the circuit
- Faulty temperature sensor
- Malfunctioning glow plug control module
- Issues with the engine's electrical system
Symptoms of P101D 2018 GMC Sierra
- Check Engine Light illuminated on the dashboard
- Difficulties starting the engine, especially in cold weather
- Rough idling and misfiring
- Decreased power output
- Excessive smoke from the exhaust
How to Fix P101D 2018 GMC Sierra
- Begin by diagnosing the specific cause of the low voltage in the Glow Plug Control Module Temperature Sensor 3 Circuit. This may involve using a multimeter to test the voltage levels in the circuit and inspecting the wiring and connectors for any damage.
- Replace the faulty temperature sensor if it is found to be the root cause of the issue. Ensure that the new sensor is compatible with the vehicle's make and model.
- If the glow plug control module is malfunctioning, replace it with a new module that meets the manufacturer's specifications. Proper installation is crucial to ensure optimal performance.
- Check and repair any damaged wiring or connectors in the circuit. Ensure that all connections are secure and free of corrosion to prevent future issues.
- Clear the error codes from the vehicle's system and perform a test drive to confirm that the issue has been resolved.
Cost to Fix P101D 2018 GMC Sierra
The typical repair costs for addressing a P101D code related to the Glow Plug Control Module Temperature Sensor 3 Circuit low voltage can range from $200 to $500, including parts and labor. However, the 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. Most auto repair shops charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships and lower at independent shops. It is advisable to obtain local quotes for a more accurate estimate of repair costs.
Need more information about the P101D 2018 GMC Sierra code?
Need more information on how to fix the P101D 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P101D 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P101D 2018 GMC Sierra Code
1. What does the OBDII code P101D mean on a 2018 GMC Sierra?
P101D indicates a low voltage issue in the Glow Plug Control Module Temperature Sensor 3 Circuit, which helps monitor and manage the glow plug system's performance.
2. What are the common symptoms of code P101D in a 2018 GMC Sierra?
Symptoms may include difficulty starting the engine in cold weather, reduced engine performance, a check engine light, or rough idling.
3. What causes the P101D code to appear?
Common causes include a faulty temperature sensor, damaged wiring or connectors in the sensor circuit, corrosion, or a malfunctioning glow plug control module.
4. Can I drive my 2018 GMC Sierra with a P101D code?
Driving with a P101D code is possible but not recommended, as it may lead to poor engine performance, especially in cold conditions, and can cause further damage if left unresolved.
5. How do I fix the P101D code on my 2018 GMC Sierra?
Repair steps include inspecting and repairing damaged wiring or connectors, replacing the temperature sensor if faulty, or replacing the glow plug control module if necessary.
6. How much does it cost to fix a P101D code?
Repair costs vary depending on the issue; replacing a sensor may cost $50–$200, while a glow plug control module replacement can cost $300–$600, plus labor.
7. Can a P101D code be caused by a dead battery?
A weak or dead battery can cause low voltage issues, potentially triggering the P101D code, so it's worth checking the battery's health.
8. How do I diagnose a P101D code on my 2018 GMC Sierra?
Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting wiring and connectors, and testing the temperature sensor and control module with a multimeter.
9. Will clearing the P101D code fix the problem?
Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from reappearing.
10. What tools are needed to troubleshoot a P101D code?
You’ll need an OBDII scanner, a multimeter for testing voltage and continuity, and possibly basic tools to inspect and replace components.
Discuss the causes and fixes for P101D 2018 GMC Sierra OBDII Code
Code P101D 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.