P1474 2017 Chevrolet Silverado Code - Particulate Matter Sensor Electrode Supply Circuit
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
- P1474 2017 Chevrolet Silverado indicates Particulate Matter Sensor Electrode Supply Circuit.
- 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 P1474 2017 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 P1474 2017 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 P1474 2017 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 P1474 2017 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 P1474 2017 Chevrolet Silverado Code
1. What does the OBDII code P1474 mean on a 2017 Chevrolet Silverado?
P1474 indicates an issue with the Particulate Matter Sensor Electrode Supply Circuit, which monitors emissions from the diesel particulate filter.
2. What are the symptoms of code P1474 in a 2017 Chevy Silverado?
Common symptoms include the check engine light turning on, reduced fuel efficiency, potential limp mode activation, and increased exhaust emissions.
3. What causes the P1474 code to appear on a 2017 Silverado?
The code can be triggered by a faulty particulate matter sensor, damaged wiring or connectors, a malfunctioning ECM, or excessive soot buildup in the exhaust system.
4. Can I drive my 2017 Chevrolet Silverado with a P1474 code?
Driving with this code is not recommended, as it may lead to further damage to the exhaust system and negatively impact emissions compliance.
5. How do you diagnose a P1474 code on a 2017 Silverado?
Diagnosis involves scanning for codes, inspecting the wiring and connectors for the particulate matter sensor, testing the sensor itself, and checking for soot buildup in the exhaust.
6. How can I fix the P1474 code on my 2017 Silverado?
Repairs may include replacing the particulate matter sensor, repairing damaged wiring, cleaning the exhaust system, or reprogramming/updating the ECM.
7. How much does it cost to fix a P1474 code on a 2017 Chevrolet Silverado?
The repair cost varies but typically ranges from $200 to $600, depending on whether the sensor needs replacement or if additional repairs are needed.
8. Can a P1474 code be caused by a clogged diesel particulate filter (DPF)?
Yes, excessive soot in the DPF can affect the particulate matter sensor and may contribute to triggering the P1474 code.
9. Does the P1474 code affect vehicle emissions?
Yes, the P1474 code indicates an issue with the emissions monitoring system and could cause the vehicle to produce higher emissions than allowed.
10. Do I need to update the ECM to resolve a P1474 code on my 2017 Silverado?
In some cases, an ECM software update may be necessary to resolve the issue, especially if the problem is related to incorrect sensor readings.
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