AutoCodes – Dodge – P1521 Dodge

P1521 Dodge Code - Incorrect Engine Oil Type

Quick Answer

Using the oil pressure, oil temperature and other vital engine inputs the Powertrain Control Module (PCM) can determine the engine oil viscosity. Common causes include Incorrect engine oil viscosity, Incorrect oil type, Oil contamination. 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: P1521 Dodge indicates Incorrect Engine Oil Type.
Common causes: Common causes include Incorrect engine oil viscosity, Incorrect oil type, Oil contamination.
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 75,483

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 07, 2020

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P1521 Dodge Description

Using the oil pressure, oil temperature and other vital engine inputs the Powertrain Control Module (PCM) can determine the engine oil viscosity. Incorrect viscosity will affect the operation of the MDS by delaying cylinder activation. The Diagnostic Trouble Code (DTC) will set when the PCM has detected an incorrect engine oil viscosity.

OBDII Code P1521 Dodge - Incorrect Engine Oil Type - AutoCodes.com — P1521 Dodge Code - Incorrect Engine Oil Type

What does this mean?

What are the Possible Causes of the DTC P1521 Dodge?

Incorrect engine oil viscosity
Incorrect oil type
Oil contamination
Faulty Engine Oil Pressure Sensor
Reprogram Powertrain Control Module (PCM)

How to Fix the DTC P1521 Dodge?

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

This Diagnostic Trouble Code (DTC) may set in high ambient temperature conditions when the correct oil type (viscosity) is being used in the Engine. If correct oil viscosity is used, but the code keeps coming back, reprogramming (refreshing) the Powertrain Control Module (PCM) will take care of the problem.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1521 Dodge 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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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 P1521 Dodge Code

1. What are the common symptoms of OBDII code P1521 in a Dodge related to Incorrect Engine Oil Type?

The common symptoms include rough idle, reduced engine performance, and potential stalling issues.

2. What are the possible causes of OBDII code P1521 in a Dodge?

The code P1521 typically occurs due to using the incorrect engine oil type or the engine oil being too thick for the vehicle's specifications.

3. How can I diagnose OBDII code P1521 in my Dodge?

You can diagnose the code by checking the engine oil level and type, ensuring it meets the manufacturer's recommendations. Additionally, performing an oil change with the correct oil type can help resolve the issue.

4. Can using the wrong engine oil type really trigger OBDII code P1521 in a Dodge?

Yes, using the wrong engine oil type can lead to the code P1521 as the engine may not operate optimally, causing issues with performance and idle quality.

5. What steps should I take to repair OBDII code P1521 in my Dodge?

To repair the code, start by draining the incorrect engine oil and replacing it with the recommended oil type specified by the manufacturer. Resetting the trouble codes after the oil change is also recommended.

6. Is it safe to continue driving my Dodge with OBDII code P1521 related to Incorrect Engine Oil Type?

It is not recommended to drive your vehicle with the code P1521 unchecked, as it can lead to further engine performance issues or potential damage if left unresolved.

7. Can a mechanic help me diagnose and repair OBDII code P1521 in my Dodge?

Yes, a mechanic can assist in diagnosing the code by checking the engine oil type and level, as well as performing an oil change if needed to resolve the issue.

8. Are there any long-term effects of ignoring OBDII code P1521 in a Dodge?

Ignoring the code P1521 can potentially lead to engine damage or reduced performance over time, so it's best to address the issue promptly.

9. How often should I check my Dodge's engine oil type to prevent OBDII code P1521?

It is recommended to check your vehicle's engine oil type and level regularly, especially before scheduled oil changes, to avoid triggering code P1521 due to incorrect oil type.

10. Can using synthetic oil instead of conventional oil trigger OBDII code P1521 in a Dodge?

Using synthetic oil that meets the manufacturer's specifications should not trigger code P1521. However, using the wrong type of synthetic oil can still lead to the code being triggered.