AutoCodes – Cadillac – P101D Cadillac

P101D Cadillac Code - Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage

Quick Answer

The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the temperature sensor circuit. Common causes include Faulty Glow Plug Control Module (GPCM), Glow Plug Control Module harness is open or shorted, Glow Plug Control Module circuit poor electrical connection. 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 Cadillac indicates Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage.
Common causes: Common causes include Faulty Glow Plug Control Module (GPCM), Glow Plug Control Module harness is open or shorted, Glow Plug Control Module circuit poor electrical connection.
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 Popularity 407

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 01, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P101D Cadillac Description

The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the temperature sensor circuit. The GPCM monitors the internal temperature sensor voltage and if the voltage is less than 0.21 V or greater than 4.94 V. The GPCM will send a message to the Engine Control Module (ECM) to set the appropriate Diagnostic Trouble Code (DTC). A DTC is detected when one of the GPCM temperature sensors voltage falls outside the calibrated threshold for greater than 1.3 s.

OBDII Code P101D Cadillac - Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage - AutoCodes.com — P101D Cadillac Code - Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P101D Cadillac?

Faulty Glow Plug Control Module (GPCM)
Glow Plug Control Module harness is open or shorted
Glow Plug Control Module circuit poor electrical connection

How to Fix the DTC P101D Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P101D Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P101D Cadillac Code

1. What are the common symptoms of OBDII code P101D in a Cadillac related to the Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage?

- Common symptoms include poor engine performance, rough idling, reduced fuel efficiency, and possible difficulty starting the vehicle.

2. What are the potential causes of OBDII code P101D in a Cadillac indicating an issue with the Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage?

- Possible causes may include a faulty glow plug control module, damaged wiring or connectors, a malfunctioning temperature sensor, or a problem with the vehicle's electrical system.

3. How can I diagnose the OBDII code P101D in my Cadillac related to the Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage?

- Diagnosing this code typically involves using a scan tool to read the code, inspecting the glow plug control module, checking the wiring for any damage, and testing the temperature sensor for proper function.

4. Can I continue driving my Cadillac with OBDII code P101D present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further engine issues and potentially cause more damage over time.

5. Will OBDII code P101D cause my Cadillac to fail an emissions test?

- Yes, this code can cause your vehicle to fail an emissions test due to the impact on engine performance and efficiency.

6. How much does it typically cost to repair OBDII code P101D in a Cadillac for the Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage issue?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 or more, including parts and labor.

7. Are there any DIY repair tips for addressing OBDII code P101D in a Cadillac?

- DIY tips may include checking and cleaning the connectors, inspecting the wiring for visible damage, and ensuring the glow plug control module is securely in place. However, complex repairs may require professional assistance.

8. How urgent is it to address OBDII code P101D in a Cadillac?

- It is recommended to address this code promptly to prevent further damage to the engine and ensure optimal vehicle performance.

9. Can extreme weather conditions affect the likelihood of OBDII code P101D appearing in a Cadillac?

- Yes, extreme cold weather conditions can put more strain on the glow plug system and increase the chances of issues related to the Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage.

10. Is it possible for a faulty battery to trigger OBDII code P101D in a Cadillac?

- Yes, a weak or faulty battery can sometimes cause voltage irregularities that may trigger the Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage code.