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Engine-Codes – GMC – P1476 2015 GMC Sierra

P1476 2015 GMC Sierra Code - Particulate Matter Sensor Electrode Supply Circuit High Voltage

Quick Answer

The P1476 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates an issue with the Particulate Matter Sensor Electrode Supply Circuit being at a high voltage. Common causes include Damaged wiring or connectors in the Particulate Matter Sensor Electrode Supply Circuit, A faulty Particulate Matter Sensor, Malfunctioning engine control module (ECM). 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
P1476 2015 GMC Sierra indicates Particulate Matter Sensor Electrode Supply Circuit High Voltage.
Common causes
Common causes include Damaged wiring or connectors in the Particulate Matter Sensor Electrode Supply Circuit, A faulty Particulate Matter Sensor, Malfunctioning engine control module (ECM).
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P1476 2015 GMC Sierra Description

The P1476 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates an issue with the Particulate Matter Sensor Electrode Supply Circuit being at a high voltage. This sensor is responsible for monitoring the amount of particulate matter in the exhaust gases produced by the vehicle's engine. The sensor plays a crucial role in ensuring compliance with emissions regulations and optimizing the vehicle's performance.

OBDII Code P1476 2015 GMC Sierra - Particulate Matter Sensor Electrode Supply Circuit High Voltage
P1476 2015 GMC Sierra Code - Particulate Matter Sensor Electrode Supply Circuit High Voltage

Common Causes of P1476 2015 GMC Sierra

  1. Damaged wiring or connectors in the Particulate Matter Sensor Electrode Supply Circuit
  2. A faulty Particulate Matter Sensor
  3. Malfunctioning engine control module (ECM)
  4. Corrosion or debris affecting sensor operation
  5. Electrical issues within the sensor circuit

Symptoms of P1476 2015 GMC Sierra

  1. Illumination of the check engine light on the vehicle's dashboard
  2. Reduced fuel efficiency
  3. Increased emissions output
  4. Difficulty passing emissions tests
  5. Engine performance issues such as hesitation or rough idling

How to Fix P1476 2015 GMC Sierra

  1. Use a diagnostic scanner to retrieve the specific trouble code and confirm the issue.
  2. Inspect the wiring and connectors in the Particulate Matter Sensor Electrode Supply Circuit for any damage or corrosion.
  3. Test the Particulate Matter Sensor's operation and replace if necessary.
  4. Check the engine control module (ECM) for any faults related to the sensor circuit.
  5. Clear the trouble code from the vehicle's ECM memory and test drive the vehicle to ensure the issue is resolved.

Cost to Fix P1476 2015 GMC Sierra

The cost of repairing a P1476 code on a 2015 GMC Sierra can vary depending on the exact cause of the issue and the necessary repairs. On average, the cost for parts and labor to address this code can range from $200 to $500. However, it's important to note that prices can fluctuate based on location, vehicle make and model, and the specific repair shop. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate for this repair. Keep in mind that diagnostic time and labor rates can also impact the overall cost.

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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 P1476 2015 GMC Sierra Code

1. What does OBDII code P1476 mean on a 2015 GMC Sierra?

P1476 indicates an issue with the particulate matter sensor electrode supply circuit, specifically detecting a high voltage condition.

2. What are the common symptoms of code P1476 on a 2015 GMC Sierra?

Symptoms may include the check engine light turning on, reduced engine performance, poor fuel economy, or issues with the diesel particulate filter (DPF).

3. What causes code P1476 on a 2015 GMC Sierra?

Common causes include a faulty particulate matter sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning Engine Control Module (ECM).

4. Can a dirty diesel particulate filter trigger code P1476?

No, P1476 is related to the particulate matter sensor's electrode supply circuit and not directly caused by the condition of the DPF itself.

5. How is code P1476 diagnosed on a 2015 GMC Sierra?

A technician will use a scan tool to confirm the code, inspect the wiring and connectors for damage, test the particulate matter sensor, and ensure the ECM is functioning correctly.

6. Can I drive my 2015 GMC Sierra with code P1476 active?

It is not recommended to drive for an extended period, as this code may result in improper DPF operation, leading to further engine or emissions-related issues.

7. How do you fix code P1476 on a 2015 GMC Sierra?

Repairs may include replacing the particulate matter sensor, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.

8. What tools are needed to troubleshoot code P1476?

Tools include an OBDII scanner, multimeter for checking voltage and continuity, and possibly a wiring diagram for the particulate matter sensor circuit.

9. Is code P1476 covered under the emissions warranty for a 2015 GMC Sierra?

This depends on your vehicle’s mileage and local warranty regulations, but emissions-related components like the particulate matter sensor may be covered under extended warranties.

10. What happens if code P1476 is ignored?

Ignoring this code could lead to further engine or emissions system damage, including DPF failure, decreased performance, and potential regulatory fines for excessive emissions.

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