AutoCodes – Buick – P1476 Buick

P1476 Buick 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 Buick 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.

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Code Popularity 689

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 Sep 30, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1476 Buick Description

The Particulate Matter (PM) sensor monitors the amount of the particulates (soot) in the diesel exhaust gas exiting the tailpipe. The PM sensor is similar to the heated oxygen sensor with a ceramic element but also includes an individually calibrated Sensor Control Unit (SCU). The sensing element includes comb-shaped Interdigital Electrodes (IDE), a heater and a positive temperature coefficient resistor for temperature measurement.
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.

OBDII Code P1476 Buick - Particulate Matter Sensor Electrode Supply Circuit High Voltage - AutoCodes.com — P1476 Buick Code - Particulate Matter Sensor Electrode Supply Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1476 Buick?

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 Buick?

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 Buick 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 P1476 Buick Code

1. What are common symptoms of OBDII code P1476 in a Buick related to the Particulate Matter Sensor Electrode Supply Circuit High Voltage?

- Common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What are the potential causes of OBDII code P1476 in a Buick?

- Possible causes include a faulty particulate matter sensor, issues with the electrode supply circuit, wiring problems, or a malfunctioning engine control module.

3. How can I diagnose the Particulate Matter Sensor Electrode Supply Circuit High Voltage issue in my Buick?

- Diagnosing this issue typically involves using a diagnostic scanner to read the OBDII trouble code, checking the wiring and connections related to the sensor, and testing the sensor's functionality.

4. Is it safe to continue driving my Buick with OBDII code P1476 triggered?

- It is recommended to address the issue promptly to prevent potential damage to the engine or emission control system. Continued driving with the problem unresolved may lead to further complications.

5. Can I repair OBDII code P1476 in my Buick myself?

- Depending on your automotive knowledge and skills, you may be able to address this issue yourself by inspecting the sensor, checking the wiring, and replacing any faulty components. However, professional assistance is recommended for accurate diagnosis and repair.

6. How much does it typically cost to repair OBDII code P1476 in a Buick?

- The cost of repair can vary depending on the specific cause of the issue and whether you perform the repairs yourself or seek professional help. Costs may range from a few hundred to a few thousand dollars.

7. Will resetting the check engine light resolve OBDII code P1476 in my Buick?

- Resetting the check engine light may temporarily turn it off, but it will not fix the underlying issue causing the trouble code. The problem should be diagnosed and repaired to prevent it from reoccurring.

8. Are there any preventive measures to avoid triggering OBDII code P1476 in my Buick?

- Regular maintenance, such as keeping the engine properly tuned, checking the wiring harness for damage, and using high-quality fuel, can help prevent issues that may lead to the triggering of this trouble code.

9. Can a faulty particulate matter sensor cause other problems in my Buick besides triggering OBDII code P1476?

- Yes, a faulty particulate matter sensor can lead to various performance issues, reduced fuel efficiency, and potentially harm the vehicle's emission levels, impacting overall engine operation.

10. How long does it typically take to repair OBDII code P1476 in a Buick?

- The repair time can vary based on the specific cause of the issue, availability of parts, and whether you are performing the repair yourself or taking it to a professional. It may take anywhere from a few hours to a day or more to address the problem effectively.