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Engine-Codes – GMC – P0523 2017 GMC Sierra

P0523 2017 GMC Sierra Code - Engine Oil Pressure Sensor Circuit High Voltage

Quick Answer

The P0523 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that there is a high voltage condition detected in the engine oil pressure sensor circuit. Common causes include Faulty engine oil pressure sensor, Wiring or connector issues in the oil pressure sensor circuit, Low engine oil level or degraded oil quality. 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
P0523 2017 GMC Sierra indicates Engine Oil Pressure Sensor Circuit High Voltage.
Common causes
Common causes include Faulty engine oil pressure sensor, Wiring or connector issues in the oil pressure sensor circuit, Low engine oil level or degraded oil quality.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0523 2017 GMC Sierra Description

The P0523 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that there is a high voltage condition detected in the engine oil pressure sensor circuit. The engine oil pressure sensor is a crucial component that monitors the oil pressure in the engine. This information is essential for the engine control module (ECM) to adjust various parameters such as fuel delivery, ignition timing, and other functions to ensure optimal engine performance and longevity.

OBDII Code P0523 2017 GMC Sierra - Engine Oil Pressure Sensor Circuit High Voltage
P0523 2017 GMC Sierra Code - Engine Oil Pressure Sensor Circuit High Voltage

Common Causes of P0523 2017 GMC Sierra

  1. Faulty engine oil pressure sensor.
  2. Wiring or connector issues in the oil pressure sensor circuit.
  3. Low engine oil level or degraded oil quality.
  4. Engine oil pump malfunction.
  5. ECM software or hardware issues.

Symptoms of P0523 2017 GMC Sierra

  1. Illumination of the check engine light on the dashboard.
  2. Fluctuating oil pressure gauge readings or readings that are consistently high.
  3. Engine knocking or ticking noises, especially at idle or under load.
  4. Engine performance issues such as reduced power or hesitation.
  5. Potential engine damage if the issue is not resolved promptly.

How to Fix P0523 2017 GMC Sierra

  1. Begin by verifying the DTC with a scan tool and confirming the symptoms associated with the code.
  2. Inspect the engine oil pressure sensor, wiring, and connectors for any visible damage or corrosion. Replace or repair as necessary.
  3. Check the engine oil level and quality. Top up the oil if low and replace if degraded.
  4. Test the engine oil pressure using a mechanical gauge to verify the sensor's readings.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0523 2017 GMC Sierra

The cost of repairing a P0523 DTC on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing the engine oil pressure sensor can cost between $50 and $150, while addressing wiring or connector issues may range from $100 to $300. If the problem is related to the engine oil pump or ECM, the repair costs can increase significantly. Labor rates at auto repair shops typically range from $80 to $150 per hour, so it's advisable to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P0523 2017 GMC Sierra

DTC P0521 can be set if engine oil pressure is outside the calculated engine oil pressure model stored in the engine control module. This can be an indication of mechanical engine issues causing lower than expected engine oil pressure.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0523 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P0523 in a 2017 GMC Sierra?

- Common symptoms include the illumination of the check engine light, erratic oil pressure readings on the gauge, and potential engine stalling or rough idling.

2. What does the OBDII code P0523 indicate on a 2017 GMC Sierra?

- OBDII code P0523 indicates a high voltage in the engine oil pressure sensor circuit in the 2017 GMC Sierra, triggering the check engine light.

3. What are the possible causes of OBDII code P0523 in a 2017 GMC Sierra?

- Potential causes include a faulty engine oil pressure sensor, wiring issues in the sensor circuit, low engine oil level, or a malfunctioning oil pump.

4. How can I diagnose the cause of OBDII code P0523 in my 2017 GMC Sierra?

- Diagnose by checking the engine oil level, inspecting the wiring connected to the oil pressure sensor, and testing the sensor itself using a multimeter for proper voltage readings.

5. Can I continue driving my 2017 GMC Sierra with OBDII code P0523?

- It is not recommended to continue driving with this code as it can lead to potential engine damage due to inaccurate oil pressure readings.

6. How can I repair OBDII code P0523 in my 2017 GMC Sierra?

- Repair options include replacing the engine oil pressure sensor, repairing any damaged wiring, ensuring the engine oil level is correct, or addressing any issues with the oil pump.

7. Will resetting the check engine light resolve OBDII code P0523 in a 2017 GMC Sierra?

- Resetting the check engine light may temporarily turn it off, but it will not fix the underlying issue causing the high voltage in the oil pressure sensor circuit.

8. How much does it cost to repair OBDII code P0523 in a 2017 GMC Sierra?

- Repair costs can vary depending on the root cause of the issue, but expect to pay for parts and labor, which can range from $100 to $300 or more.

9. Can a DIY enthusiast fix OBDII code P0523 in a 2017 GMC Sierra?

- Depending on their skill level, a DIY enthusiast may be able to replace the engine oil pressure sensor and perform basic wiring checks, but more complex diagnostics may require professional help.

10. How often does OBDII code P0523 occur in 2017 GMC Sierra vehicles?

- While not extremely common, OBDII code P0523 can occur in 2017 GMC Sierra vehicles due to various factors, such as sensor wear or electrical issues.

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