P1474 2015 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 2015 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 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 P1474 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 P1474 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 P1474 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 P1474 2015 Chevrolet Silverado Code
1. What does the OBDII code P1474 mean on a 2015 Chevrolet Silverado?
The P1474 code indicates an issue with the particulate matter sensor electrode supply circuit, which monitors and regulates the diesel particulate filter (DPF) system.
2. What are the common symptoms of code P1474 in a 2015 Chevrolet Silverado?
Symptoms may include a check engine light, reduced engine performance, increased exhaust emissions, or issues with the DPF regeneration process.
3. What causes the P1474 code to appear on a 2015 Chevrolet Silverado?
Common causes include a faulty particulate matter sensor, wiring or connector issues in the sensor circuit, or a malfunctioning powertrain control module (PCM).
4. Can I drive my 2015 Chevrolet Silverado with the P1474 code active?
While the truck may still be drivable, prolonged operation with this code can lead to reduced fuel efficiency, increased emissions, and potential damage to the DPF system.
5. How do I diagnose the P1474 code on a 2015 Chevrolet Silverado?
Diagnosis involves using an OBDII scanner to verify the code, inspecting the particulate matter sensor and its wiring for damage, and testing the circuit for proper voltage and continuity.
6. How is the P1474 code repaired on a 2015 Chevrolet Silverado?
Repairs may include replacing a faulty particulate matter sensor, repairing damaged wiring or connectors, or reprogramming/updating the PCM if needed.
7. How much does it cost to fix the P1474 code on a 2015 Chevrolet Silverado?
The cost depends on the specific repair, but replacing the particulate matter sensor typically ranges from $300 to $600, including parts and labor.
8. Can a dirty particulate matter sensor cause the P1474 code?
Yes, a dirty or clogged particulate matter sensor can affect its performance and trigger this code. Cleaning or replacing the sensor may resolve the issue.
9. Is the P1474 code related to the diesel particulate filter (DPF) on a 2015 Chevrolet Silverado?
Yes, the code is related to the DPF system, as the particulate matter sensor monitors the exhaust particles to ensure proper DPF operation.
10. What tools are needed to troubleshoot the P1474 code on a 2015 Chevrolet Silverado?
You’ll need an OBDII scanner, a multimeter for electrical testing, and possibly a repair manual or wiring diagram for guidance.
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