AutoCodes – Generic – P1D5C

P1D5C Code - Sensor Ground Reference 1 Circuit

Quick Answer

This diagnostic checks for a loss of connection of the sensor ground reference. Common causes include Sensor Ground Circuit Open or High Resistance, Sensor Ground Circuit Shorted to voltage, Faulty Transmission Control Module (TCM). 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: P1D5C indicates Sensor Ground Reference 1 Circuit.
Common causes: Common causes include Sensor Ground Circuit Open or High Resistance, Sensor Ground Circuit Shorted to voltage, Faulty Transmission Control Module (TCM).
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 1,323

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 Apr 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1D5C Description

This diagnostic checks for a loss of connection of the sensor ground reference. The common ground reference is provided to all sensors by the Transmission Control Module (TCM) via three different connector pins, named GNDSENS1, GNDSENS2 and GNDSENS3. In order to ensure that the system continues to work properly even if one of the ground pin is disconnected, the most critical sensors have their ground reference connected to both GNDSENS1 and GNDSENS2, so that only a loss of connection of both pins will cause a loss of ability to shift gears. These sensors are the gate select position sensor, the odd and even clutch speed sensors, all the gear actuator position sensors and the even clutch pressure sensor. The odd clutch position sensor, the hydraulic pressure sensor and the park position sensor have instead their ground reference connected to GNDSENS3. When a loss of connection of both GNDSENS1 and GNDSENS2 or only GNDSENS3 is detected, the diagnostic will set a fault in the TCM.

OBDII Code P1D5C - Sensor Ground Reference 1 Circuit - AutoCodes.com — P1D5C Code - Sensor Ground Reference 1 Circuit

What does this mean?

What are the Possible Causes of the DTC P1D5C?

Sensor Ground Circuit Open or High Resistance
Sensor Ground Circuit Shorted to voltage
Faulty Transmission Control Module (TCM)

How to Fix the DTC P1D5C?

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 P1D5C 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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Information for Specific Makes

P1D5C Chrysler — Sensor Ground Reference 1 Circuit
P1D5C Dodge — Sensor Ground Reference 1 Circuit
P1D5C Fiat — Sensor Ground Reference 1 Circuit
P1D5C Jeep — Sensor Ground Reference 1 Circuit

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 P1D5C Code

1. What are the common symptoms of OBDII code P1D5C (Sensor Ground Reference 1 Circuit)?

- Common symptoms include engine misfires, rough idling, poor acceleration, and a decrease in fuel efficiency.

2. What are the possible causes of OBDII code P1D5C?

- The code may be triggered by a faulty sensor ground reference circuit, damaged wiring or connectors, or a malfunctioning engine control module (ECM).

3. How can I diagnose the Sensor Ground Reference 1 Circuit issue associated with code P1D5C?

- To diagnose the issue, you can perform a visual inspection of the wiring and connectors, test the sensor ground reference circuit for continuity, and use a multimeter to check voltage levels.

4. Can a loose or corroded ground connection cause OBDII code P1D5C?

- Yes, a loose or corroded ground connection can disrupt the sensor ground reference circuit and trigger the P1D5C trouble code.

5. What is the recommended repair for OBDII code P1D5C?

- The recommended repair involves fixing any damaged wiring or connectors, repairing or replacing the faulty sensor ground reference circuit, and addressing any ECM issues.

6. Is it safe to continue driving with OBDII code P1D5C present?

- It is not advisable to continue driving with the P1D5C code active, as it can lead to further engine problems and reduced performance.

7. Can a DIY enthusiast fix the Sensor Ground Reference 1 Circuit issue causing code P1D5C?

- Depending on your skill level and access to tools, a DIY enthusiast may be able to address the issue by following repair guides and using appropriate diagnostic equipment.

8. How much does it typically cost to repair OBDII code P1D5C at a mechanic or dealership?

- The cost of repairing OBDII code P1D5C can vary depending on the extent of the issue, but it may range from $100 to $500 at a mechanic or dealership.

9. Can resetting the OBDII system clear the P1D5C trouble code temporarily?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to reappear after driving the vehicle.

10. Are there any preventive measures to avoid OBDII code P1D5C in the future?

- Regular maintenance checks, including inspecting wiring and connectors, ensuring proper ground connections, and promptly addressing any ECM issues, can help prevent the recurrence of code P1D5C.