P1476 2016 GMC Sierra Code - Particulate Matter Sensor Electrode Supply Circuit High Voltage
Quick Answer
The Particulate Matter (PM) sensor monitors the amount of the particulates (soot) in the diesel exhaust gas exiting the tailpipe. Common causes include Faulty Exhaust Particulate Matter Sensor, Exhaust Particulate Matter Sensor harness is open or shorted, Exhaust Particulate Matter Sensor 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
- P1476 2016 GMC Sierra indicates Particulate Matter Sensor Electrode Supply Circuit High Voltage.
- Common causes
- Common causes include Faulty Exhaust Particulate Matter Sensor, Exhaust Particulate Matter Sensor harness is open or shorted, Exhaust Particulate Matter Sensor 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.
Code P1476 2016 GMC Sierra Description
The operation of the PM Sensor is based on the electrical conductivity characteristic of the diesel particulate. As the exhaust gas flows over the sensing element, soot is absorbed in the combs between the electrodes, eventually creating a conductive path. When the path is formed, it generates a current based on the voltage being applied to the element. The measurement process continues until a preset current value is reached. To avoid misleading readings, the sensor performs a regeneration where the soot is cleaned off by heating up the element before the measurement phase begins. The amount of regenerations is based on vehicle strategy; when the calibrated number of regenerations is reached, the cumulative current readings are used to determine the amount of soot concentration in the exhaust gas which in turn determines the collection efficiency of the Diesel Particulate Filter (DPF).
The Diagnostic Trouble Code (DTC) will be set when the particular matter sensor control unit detects a fault in the particulate matter sensor circuitry.
What are the Possible Causes of the DTC P1476 2016 GMC Sierra?
- Faulty Exhaust Particulate Matter Sensor
- Exhaust Particulate Matter Sensor harness is open or shorted
- Exhaust Particulate Matter Sensor circuit poor electrical connection
How to Fix the DTC P1476 2016 GMC Sierra?
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 P1476 2016 GMC Sierra 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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Frequently Asked Questions about P1476 2016 GMC Sierra Code
1. What does the OBDII code P1476 mean on a 2016 GMC Sierra?
Code P1476 indicates a high voltage issue in the particulate matter sensor electrode supply circuit, which monitors exhaust emissions.
2. What are the symptoms of a P1476 code on a 2016 GMC Sierra?
Symptoms may include the check engine light turning on, reduced engine performance, increased exhaust smoke, or failure to meet emissions standards.
3. What causes the P1476 code to appear on a 2016 GMC Sierra?
Common causes include a faulty particulate matter sensor, damaged wiring or connectors in the sensor circuit, or an issue with the engine control module (ECM).
4. Can I drive my 2016 GMC Sierra with a P1476 code?
While the vehicle may still be drivable, prolonged operation with this code can lead to increased emissions and potential damage to the exhaust system.
5. How do I diagnose a P1476 code on a 2016 GMC Sierra?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting the particulate matter sensor and its wiring, and testing the voltage in the sensor circuit.
6. How do you fix the P1476 code on a 2016 GMC Sierra?
Repairs may include replacing the particulate matter sensor, repairing or replacing damaged wiring, or reprogramming/updating the ECM if needed.
7. How much does it cost to repair a P1476 code on a 2016 GMC Sierra?
The repair cost can vary, but replacing a particulate matter sensor typically ranges from $300 to $800, including parts and labor.
8. Can a dirty exhaust system cause a P1476 code on a 2016 GMC Sierra?
Yes, excessive soot or particulate buildup can affect the functionality of the particulate matter sensor, potentially triggering the code.
9. Do I need to reset the ECM after fixing the P1476 code on a 2016 GMC Sierra?
Yes, after completing repairs, you should clear the code with an OBDII scanner and perform a test drive to ensure the issue is resolved.
10. How can I prevent a P1476 code from recurring on my 2016 GMC Sierra?
Regular maintenance, including cleaning or replacing the particulate matter sensor as needed and ensuring the exhaust system is in good condition, can help prevent this code from recurring.
Discuss the causes and fixes for P1476 2016 GMC Sierra OBDII Code
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