AutoCodes – GMC – P0523 2017 GMC Sierra

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

Quick Answer

The engine oil pressure sensor changes voltage based on the engine oil pressure. Common causes include Low oil level, Faulty Engine Oil Pressure Sensor, Engine Oil Pressure Sensor harness is open or shorted. 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 Low oil level, Faulty Engine Oil Pressure Sensor, Engine Oil Pressure Sensor harness is open or shorted.
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.

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Code Popularity 377

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 30, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0523 2017 GMC Sierra Description

The engine oil pressure sensor changes voltage based on the engine oil pressure. The engine oil pressure sensor is a 3-wire sensor comprising the signal circuit, the low reference circuit, and the 5 V reference circuit. The Engine Control Module (ECM) supplies 5 V to the engine oil pressure sensor via the 5 V reference circuit and provides ground via the low reference circuit. The ECM monitors the signal circuit of the engine oil pressure sensor to determine if the engine oil pressure sensor voltage is within the normal operating range of approximately 1 - 4 V. When the engine oil pressure is high, the engine oil pressure sensor voltage is high, and the ECM senses a high signal voltage. When the engine oil pressure is low, the engine oil pressure sensor voltage is low, and the ECM senses a low signal voltage. The ECM sends the engine oil pressure information to the instrument cluster via serial data. The instrument cluster will illuminate or display the engine oil pressure indicator when the engine oil pressure is low. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the engine oil pressure sensor signal circuit is greater than 4.8 V for greater than 10 s.

OBDII Code P0523 2017 GMC Sierra - Engine Oil Pressure Sensor Circuit High Voltage - AutoCodes.com — P0523 2017 GMC Sierra Code - Engine Oil Pressure Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0523 2017 GMC Sierra?

Low oil level
Faulty Engine Oil Pressure Sensor
Engine Oil Pressure Sensor harness is open or shorted
Engine Oil Pressure Sensor circuit poor electrical connection
Engine Mechanical Problem
Faulty Engine Control Module (ECM)

How to Fix the DTC P0523 2017 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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0523 2017 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 P0523 2017 GMC Sierra code?

Need more information on how to fix the P0523 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.