AutoCodes – Chevrolet – P0521 2014 Chevrolet Silverado

P0521 2014 Chevrolet Silverado Code - Engine Oil Pressure Sensor Performance

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: P0521 2014 Chevrolet Silverado indicates Engine Oil Pressure Sensor Performance.
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 996

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 P0521 2014 Chevrolet Silverado 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 measured oil pressure is at least 47 kPa (6.8 psi) less than or 50 kPa (7.3 psi) higher than the predicted oil pressure or the engine oil pressure is outside of a calculated working range determined by engine speed and temperature.

OBDII Code P0521 2014 Chevrolet Silverado - Engine Oil Pressure Sensor Performance - AutoCodes.com — P0521 2014 Chevrolet Silverado Code - Engine Oil Pressure Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P0521 2014 Chevrolet Silverado?

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 P0521 2014 Chevrolet Silverado?

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.

There is a factory service bulletin for the following Chevrolet models:
2010 Chevrolet Camaro SS
2007-2010 Chevrolet Avalanche
2007-2010 Chevrolet Silverado
2007-2010 Chevrolet Suburban
2007-2010 Chevrolet Tahoe
2007-2009 Chevrolet Impala
2005-2009 Chevrolet Trailblazer
2007 Chevrolet Monte Carlo
Chevrolet Factory Service Bulletin OBDII Code P0521

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0521 2014 Chevrolet Silverado 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 P0521 2014 Chevrolet Silverado 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 P0521 2014 Chevrolet Silverado Code

1. What does the OBDII code P0521 mean on a 2014 Chevrolet Silverado?

P0521 indicates a performance issue with the engine oil pressure sensor, meaning the sensor is detecting oil pressure readings outside the expected range or inconsistent with engine conditions.

2. What are the common symptoms of code P0521 in a 2014 Chevy Silverado?

Symptoms include the check engine light turning on, erratic or incorrect oil pressure gauge readings, engine performance issues, and in some cases, engine ticking or knocking noises.

3. What causes the P0521 code on a 2014 Chevrolet Silverado?

Common causes include a faulty oil pressure sensor, low or dirty engine oil, a clogged oil filter, wiring or connector issues, or internal engine problems such as a failing oil pump.

4. Can I drive my 2014 Chevrolet Silverado with the P0521 code?

It is not recommended to drive with this code, as low oil pressure or inaccurate readings can lead to severe engine damage if not addressed promptly.

5. How do I diagnose the P0521 code on a 2014 Chevy Silverado?

Diagnosis typically involves checking the oil level and condition, inspecting the oil pressure sensor and its wiring, testing the oil pressure with a mechanical gauge, and scanning the vehicle for related codes.

6. How do I fix the P0521 code on my 2014 Chevrolet Silverado?

Repairs may include replacing the oil pressure sensor, cleaning or replacing the oil filter, changing the engine oil, repairing damaged wiring, or addressing internal engine issues if necessary.

7. How much does it cost to fix the P0521 code on a 2014 Chevy Silverado?

The cost depends on the root cause. Replacing the oil pressure sensor typically costs between $150 and $300, including parts and labor. Other repairs, such as addressing internal engine issues, can be more expensive.

8. Can a dirty oil filter cause the P0521 code on a 2014 Chevrolet Silverado?

Yes, a dirty or clogged oil filter can restrict oil flow, leading to incorrect oil pressure readings and triggering the P0521 code.

9. How often should I replace the oil pressure sensor on my 2014 Chevy Silverado?

The oil pressure sensor does not have a scheduled replacement interval. It should be replaced if it fails or shows signs of malfunction, such as triggering the P0521 code.

10. Will an oil change clear the P0521 code on a 2014 Chevrolet Silverado?

If the code is caused by low or dirty oil, an oil change may resolve the issue. However, if the sensor or other components are faulty, additional repairs will be required.