P1477 2015 Chevrolet Silverado Code - Particulate Matter Sensor Temperature Circuit Low 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
- P1477 2015 Chevrolet Silverado indicates Particulate Matter Sensor Temperature Circuit Low 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 P1477 2015 Chevrolet Silverado 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 P1477 2015 Chevrolet Silverado?
- 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 P1477 2015 Chevrolet Silverado?
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 P1477 2015 Chevrolet Silverado 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 P1477 2015 Chevrolet Silverado Code
What does the OBDII code P1477 mean on a 2015 Chevrolet Silverado?
1. P1477 indicates a "Particulate Matter Sensor Temperature Circuit Low Voltage," meaning the sensor that monitors the temperature of the diesel particulate filter is detecting voltage lower than expected. 2.
What are the common symptoms of P1477 on a 2015 Chevrolet Silverado?
Common symptoms include the check engine light turning on, reduced engine performance, poor fuel efficiency, and potential issues with the exhaust regeneration process. 3.
What causes the P1477 code on a 2015 Chevrolet Silverado?
The code can be caused by a faulty particulate matter sensor, damaged wiring or connectors, a blown fuse, or an issue with the engine control module (ECM). 4.
Is it safe to drive my 2015 Chevrolet Silverado with a P1477 code?
While the truck may still be drivable, it’s not recommended to ignore this code, as it may result in poor engine performance and damage to the diesel particulate filter over time. 5.
How can I diagnose the P1477 code on my 2015 Chevrolet Silverado?
Diagnosing P1477 involves using an OBDII scanner to confirm the code, visually inspecting the wiring and connectors for damage, and testing the particulate matter sensor for proper voltage and resistance. 6.
Can a clogged diesel particulate filter cause the P1477 code?
No, a clogged diesel particulate filter does not directly cause P1477, but it can lead to other issues that may indirectly affect the particulate matter sensor. 7.
How do I fix the P1477 code on a 2015 Chevrolet Silverado?
Fixes may include replacing the particulate matter sensor, repairing damaged wiring or connectors, checking fuses, or updating/reprogramming the ECM if necessary. 8.
How much does it cost to repair the P1477 code on a 2015 Chevrolet Silverado?
Repair costs can vary but typically range from $200 to $600, depending on whether the sensor needs replacing or if there are wiring issues to address. 9.
Can a faulty ECM cause the P1477 code on a 2015 Chevrolet Silverado?
Yes, a malfunctioning ECM can occasionally cause the P1477 code, though this is less common than sensor or wiring issues. 10.
Will clearing the P1477 code fix the problem on my 2015 Chevrolet Silverado?
Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.
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