AutoCodes – Chevrolet – P0521 2016 Chevrolet Silverado

P0521 2016 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 2016 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 676

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 2016 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 2016 Chevrolet Silverado - Engine Oil Pressure Sensor Performance - AutoCodes.com — P0521 2016 Chevrolet Silverado Code - Engine Oil Pressure Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P0521 2016 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 2016 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 2016 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 2016 Chevrolet Silverado code?

Need more information on how to fix the P0521 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0521 in a 2016 Chevrolet Silverado?

Low oil pressure warning light, engine knocking noises, and oil leaks are common symptoms associated with a faulty engine oil pressure sensor.

2. What are the possible causes of the P0521 code in a 2016 Chevrolet Silverado?

The P0521 code in a 2016 Chevrolet Silverado is often triggered by a malfunctioning engine oil pressure sensor, low oil level, clogged oil passages, or a faulty oil pump.

3. How can I diagnose the P0521 code in my 2016 Chevrolet Silverado?

To diagnose the P0521 code, you can use an OBDII scanner to retrieve the fault code and inspect the engine oil pressure sensor, oil level, and oil pressure to determine the root cause of the issue.

4. Can I continue driving my 2016 Chevrolet Silverado with the P0521 code?

It is not recommended to continue driving your 2016 Chevrolet Silverado with the P0521 code, as it can lead to serious engine damage due to inadequate lubrication. It is best to address the issue promptly.

5. How can I repair the P0521 code in my 2016 Chevrolet Silverado?

Repairing the P0521 code in a 2016 Chevrolet Silverado involves replacing the faulty engine oil pressure sensor, checking and replenishing the oil level, and ensuring proper oil pressure by inspecting the oil pump and passages.

6. Is it possible to reset the P0521 code in a 2016 Chevrolet Silverado without fixing the underlying issue?

While you can clear the P0521 code using an OBDII scanner, it is crucial to address the root cause of the problem to prevent further damage to the engine. Simply resetting the code without fixing the issue is not a recommended long-term solution.

7. How much does it cost to repair the P0521 code in a 2016 Chevrolet Silverado?

The cost of repairing the P0521 code in a 2016 Chevrolet Silverado can vary depending on the labor rates and parts prices in your area. Generally, replacing the engine oil pressure sensor can cost between $100 to $300, excluding labor charges.

8. Can a DIY enthusiast replace the engine oil pressure sensor to fix the P0521 code in a 2016 Chevrolet Silverado?

Replacing the engine oil pressure sensor to fix the P0521 code in a 2016 Chevrolet Silverado is a moderately challenging task and requires basic mechanical skills. If you're comfortable working on your vehicle, you can attempt this repair with the help of online guides or service manuals.

9. Will fixing the P0521 code improve the performance and fuel efficiency of my 2016 Chevrolet Silverado?

Fixing the P0521 code in your 2016 Chevrolet Silverado will restore proper oil pressure monitoring, which is crucial for engine performance and longevity. Addressing this issue promptly can help maintain optimal fuel efficiency and prevent potential engine damage.

10. How often should I check the engine oil pressure sensor in my 2016 Chevrolet Silverado to prevent the P0521 code from recurring?

It is recommended to include a regular inspection of the engine oil pressure sensor during routine maintenance checks for your 2016 Chevrolet Silverado. Monitoring oil levels, pressure, and the sensor's condition can help prevent the recurrence of the P0521 code and ensure proper engine operation.