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P1477 2018 Chevrolet Silverado Code - Particulate Matter Sensor Temperature Circuit Low Voltage

Quick Answer

The P1477 diagnostic trouble code (DTC) in a 2018 Chevrolet Silverado indicates an issue with the Particulate Matter Sensor Temperature Circuit registering low voltage. Common causes include Faulty particulate matter sensor, Damaged wiring or connectors in the temperature circuit, Corrosion or contamination in sensor connections. 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
P1477 2018 Chevrolet Silverado indicates Particulate Matter Sensor Temperature Circuit Low Voltage.
Common causes
Common causes include Faulty particulate matter sensor, Damaged wiring or connectors in the temperature circuit, Corrosion or contamination in sensor connections.
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 13, 2024
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Code P1477 2018 Chevrolet Silverado Description

The P1477 diagnostic trouble code (DTC) in a 2018 Chevrolet Silverado indicates an issue with the Particulate Matter Sensor Temperature Circuit registering low voltage. This sensor is crucial for monitoring the temperature of the particulate matter in the exhaust system. The sensor plays a vital role in ensuring the proper functioning of the vehicle's emissions control system, specifically in diesel engines where particulate matter levels need to be closely monitored.

OBDII Code P1477 2018 Chevrolet Silverado - Particulate Matter Sensor Temperature Circuit Low Voltage
P1477 2018 Chevrolet Silverado Code - Particulate Matter Sensor Temperature Circuit Low Voltage

Common Causes of P1477 2018 Chevrolet Silverado

  1. Faulty particulate matter sensor
  2. Damaged wiring or connectors in the temperature circuit
  3. Corrosion or contamination in sensor connections
  4. ECM software issues
  5. Exhaust system leaks

Symptoms of P1477 2018 Chevrolet Silverado

  1. Check engine light illuminated
  2. Decreased fuel efficiency
  3. Reduced engine performance
  4. Increased emissions output
  5. Rough idling or stalling

How to Fix P1477 2018 Chevrolet Silverado

  1. Begin by conducting a thorough inspection of the particulate matter sensor, wiring, and connectors for any visible damage or corrosion.
  2. Use a multimeter to test the sensor's voltage output and ensure it is within the manufacturer's specified range.
  3. Check for any exhaust system leaks that may be affecting sensor readings.
  4. If necessary, replace the faulty sensor or repair damaged wiring/connectors.
  5. Clear the DTC and perform a test drive to verify that the issue has been resolved.

Cost to Fix P1477 2018 Chevrolet Silverado

The typical repair costs for addressing a P1477 code in a 2018 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates typically range between $80 and $150 per hour, with rates potentially higher at dealerships or in metropolitan areas. Independent shops may offer lower rates, so it's advisable to inquire locally for a more accurate estimate.

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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 P1477 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P1477 in a 2018 Chevrolet Silverado?

The common symptoms of OBDII code P1477 in a 2018 Chevrolet Silverado include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P1477 on a 2018 Chevrolet Silverado indicate?

OBDII code P1477 on a 2018 Chevrolet Silverado indicates an issue with the Particulate Matter Sensor Temperature Circuit registering low voltage.

3. What are some possible causes of OBDII code P1477 in a 2018 Chevrolet Silverado?

Possible causes of OBDII code P1477 in a 2018 Chevrolet Silverado include a faulty particulate matter sensor, damaged wiring or connectors, or a malfunctioning engine control module (ECM).

4. How can I diagnose the OBDII code P1477 in my 2018 Chevrolet Silverado?

Diagnosing OBDII code P1477 in a 2018 Chevrolet Silverado typically involves using a diagnostic scanner to retrieve the trouble codes, inspecting the particulate matter sensor and related wiring, and testing the sensor's voltage levels.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P1477?

It is not recommended to continue driving your 2018 Chevrolet Silverado with OBDII code P1477, as it can lead to increased emissions, poor engine performance, and potential damage to other components.

6. How can I repair OBDII code P1477 in my 2018 Chevrolet Silverado?

Repairing OBDII code P1477 in a 2018 Chevrolet Silverado may involve replacing the faulty particulate matter sensor, repairing damaged wiring or connectors, or reprogramming the engine control module (ECM) if necessary.

7. Is it possible to reset OBDII code P1477 in a 2018 Chevrolet Silverado without fixing the underlying issue?

While clearing the trouble codes may temporarily turn off the check engine light, it is essential to address the root cause of OBDII code P1477 in a 2018 Chevrolet Silverado to prevent further issues.

8. Can a DIY enthusiast fix OBDII code P1477 in a 2018 Chevrolet Silverado?

A DIY enthusiast with the necessary tools and knowledge of automotive repairs may be able to fix OBDII code P1477 in a 2018 Chevrolet Silverado, but it is recommended to consult a professional mechanic for accurate diagnosis and repairs.

9. How much does it cost to repair OBDII code P1477 in a 2018 Chevrolet Silverado?

The cost to repair OBDII code P1477 in a 2018 Chevrolet Silverado can vary depending on the extent of the issue, the parts needed for replacement, and the labor rates of the repair shop. It is advisable to obtain quotes from multiple mechanics for an accurate estimate.

10. How can I prevent OBDII code P1477 from recurring in my 2018 Chevrolet Silverado?

To prevent OBDII code P1477 from recurring in your 2018 Chevrolet Silverado, it is essential to perform regular maintenance checks, address any underlying issues promptly, and follow the manufacturer's recommended service schedule.

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