P1474 2016 GMC Sierra 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 2016 GMC Sierra 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 2016 GMC Sierra 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 2016 GMC Sierra?
- 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 2016 GMC Sierra?
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 2016 GMC Sierra 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.
Need more information about the P1474 2016 GMC Sierra code?
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Frequently Asked Questions about P1474 2016 GMC Sierra Code
What does the OBDII code P1474 indicate for a 2016 GMC Sierra?
Code P1474 refers to an issue with the Particulate Matter Sensor Electrode Supply Circuit, indicating a problem in the electrical circuit supplying power to the particulate matter sensor.
What are the common symptoms associated with the P1474 code?
Common symptoms include a check engine light, reduced engine performance, increased emissions, and possible issues with the vehicle's fuel economy.
What could cause the P1474 code to trigger?
The P1474 code can be triggered by a faulty particulate matter sensor, wiring issues, poor electrical connections, or a malfunctioning Engine Control Module (ECM).
How can I diagnose the P1474 code?
To diagnose the P1474 code, use an OBD-II scanner to confirm the code, visually inspect the wiring and connections to the particulate matter sensor, and check the sensor’s functionality with a multimeter.
What are some common repairs for the P1474 code?
Common repairs include replacing the particulate matter sensor, repairing or replacing damaged wiring or connectors, and reprogramming or replacing the ECM if necessary.
Can I drive my 2016 GMC Sierra with the P1474 code?
While it may be possible to drive with the P1474 code, it is not recommended as it may lead to decreased performance and increased emissions.
How much does it cost to fix the P1474 code?
Repair costs can vary widely depending on the underlying issue, but you may expect to pay anywhere from $100 to $500 or more, depending on whether you need to replace the sensor, repair wiring, or address ECM issues.
Is the P1474 code serious?
Yes, the P1474 code can indicate a serious issue that affects the vehicle's emission system and overall performance, so it should be addressed promptly.
Will clearing the P1474 code reset the check engine light?
Clearing the P1474 code may reset the check engine light temporarily, but if the underlying issue is not fixed, the code will likely return.
Discuss the causes and fixes for P1474 2016 GMC Sierra OBDII Code
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