P1474 Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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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Information for Specific Chevrolet Models
- P1474 2014 Chevrolet Silverado — Particulate Matter Sensor Electrode Supply Circuit
- P1474 2015 Chevrolet Silverado — Particulate Matter Sensor Electrode Supply Circuit
- P1474 2016 Chevrolet Silverado — Particulate Matter Sensor Electrode Supply Circuit
- P1474 2017 Chevrolet Silverado — Particulate Matter Sensor Electrode Supply Circuit
- P1474 2018 Chevrolet Silverado — Particulate Matter Sensor Electrode Supply Circuit
Frequently Asked Questions about P1474 Chevrolet Code
1. What are the common symptoms of OBDII code P1474 in a Chevrolet related to the Particulate Matter Sensor Electrode Supply Circuit?
- Common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.
2. What are the possible causes of the P1474 code in a Chevrolet?
- The code P1474 in a Chevrolet could be caused by a faulty particulate matter sensor, damaged wiring or connectors, or issues with the sensor electrode supply circuit.
3. How can I diagnose the P1474 code in my Chevrolet?
- Diagnosing the P1474 code in a Chevrolet involves using an OBDII scanner to retrieve the code, inspecting the wiring and connectors for damage, and testing the particulate matter sensor for proper functioning.
4. Can I drive my Chevrolet with the P1474 code present?
- It is not recommended to drive your Chevrolet with the P1474 code present, as it can lead to further damage and potentially affect the vehicle's performance.
5. How can I repair the Particulate Matter Sensor Electrode Supply Circuit issue in my Chevrolet?
- Repairing the Particulate Matter Sensor Electrode Supply Circuit issue in a Chevrolet may involve replacing the faulty sensor, repairing or replacing damaged wiring or connectors, and clearing the trouble code with an OBDII scanner.
6. Is it necessary to visit a mechanic for the P1474 code in my Chevrolet?
- While some basic troubleshooting can be done at home, it is advisable to visit a mechanic for proper diagnosis and repair of the P1474 code in your Chevrolet.
7. Can a faulty Particulate Matter Sensor cause other problems in my Chevrolet?
- Yes, a faulty Particulate Matter Sensor can lead to decreased engine performance, reduced fuel efficiency, and potential damage to other components if not addressed promptly.
8. What is the typical cost to repair the P1474 code in a Chevrolet?
- The cost to repair the P1474 code in a Chevrolet can vary depending on the extent of the issue, but it generally ranges from $200 to $500, including parts and labor.
9. How long does it take to repair the Particulate Matter Sensor Electrode Supply Circuit problem in a Chevrolet?
- The repair time for the Particulate Matter Sensor Electrode Supply Circuit problem in a Chevrolet can vary, but it typically takes a few hours to a full day to complete the diagnosis and repair process.
10. Can I prevent the recurrence of the P1474 code in my Chevrolet?
- Regular maintenance, such as checking the sensor and wiring for damage, can help prevent the recurrence of the P1474 code in your Chevrolet.
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