P1475 2015 GMC Sierra Code - Particulate Matter Sensor Electrode Supply 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
- P1475 2015 GMC Sierra indicates Particulate Matter Sensor Electrode Supply 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 P1475 2015 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 P1475 2015 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 P1475 2015 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 P1475 2015 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.
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Frequently Asked Questions about P1475 2015 GMC Sierra Code
1. What does the OBDII code P1475 mean on a 2015 GMC Sierra?
P1475 indicates a low voltage issue in the particulate matter (PM) sensor electrode supply circuit, which monitors exhaust emissions.
2. What are the common symptoms of P1475 in a 2015 GMC Sierra?
Symptoms may include the check engine light turning on, decreased fuel efficiency, poor engine performance, or difficulty passing an emissions test.
3. What causes the P1475 code to appear in a GMC Sierra?
Common causes include a faulty PM sensor, damaged wiring or connectors in the sensor's circuit, or issues with the power supply to the sensor.
4. Can driving with the P1475 code damage my 2015 GMC Sierra?
While the vehicle may still be drivable, ignoring the issue can lead to further damage to the emissions system and potentially fail emissions testing.
5. How is the P1475 code diagnosed?
A mechanic will use a scan tool to confirm the code, inspect the PM sensor, check the wiring and connectors, and measure the voltage in the affected circuit.
6. How do you fix the P1475 code on a GMC Sierra?
Repairs may include replacing the particulate matter sensor, fixing damaged wiring or connectors, or addressing issues with the sensor's power supply.
7. How much does it cost to fix the P1475 code on a 2015 GMC Sierra?
Repair costs can range from $200 to $600, depending on whether the PM sensor needs replacement or if wiring repairs are required.
8. Can a dirty particulate matter sensor cause the P1475 code?
Yes, a dirty or contaminated PM sensor can affect its functionality and may trigger this code.
9. Can I reset the P1475 code without fixing the issue?
You can clear the code with a scan tool, but if the underlying problem isn’t resolved, the code will likely return.
10. Is the P1475 code covered under warranty for a 2015 GMC Sierra?
It may be covered under the emissions warranty, depending on the vehicle’s mileage and specific warranty terms. Check with your dealer.
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