AutoCodes – Isuzu – P1521 Isuzu

P1521 Isuzu Code - Commanded Versus Actual Throttle Position Correlation Small Stop Close

Quick Answer

P1521 Isuzu indicates Commanded Versus Actual Throttle Position Correlation Small Stop Close. Common causes include Faulty Throttle Valve Motor, Throttle Valve Motor harness is open or shorted, Throttle Valve Motor circuit poor electrical connection. 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 Isuzu indicates Commanded Versus Actual Throttle Position Correlation Small Stop Close.
Common causes: Common causes include Faulty Throttle Valve Motor, Throttle Valve Motor harness is open or shorted, Throttle Valve Motor circuit poor electrical connection.
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 2,616

How popular is this code, among other codes? Low

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 Aug 27, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1521 Isuzu Description

OBDII Code P1521 Isuzu - Commanded Versus Actual Throttle Position Correlation Small Stop Close - AutoCodes.com — P1521 Isuzu Code - Commanded Versus Actual Throttle Position Correlation Small Stop Close

What does this mean?

What are the Possible Causes of the DTC P1521 Isuzu?

Faulty Throttle Valve Motor
Throttle Valve Motor harness is open or shorted
Throttle Valve Motor circuit poor electrical connection

How to Fix the DTC P1521 Isuzu?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1521 Isuzu 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 P1521 Isuzu 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 P1521 Isuzu Code

1. What are the common symptoms of OBDII code P1521 in an Isuzu vehicle?

- Common symptoms include rough idle, lack of power, hesitation, and reduced fuel efficiency.

2. What does the OBDII code P1521 in an Isuzu indicate?

- The code P1521 indicates a discrepancy between the commanded throttle position and the actual throttle position in the vehicle.

3. What are the possible causes of the OBDII code P1521 in an Isuzu?

- Possible causes include a faulty throttle position sensor, issues with the throttle body, wiring or connector problems, or a malfunctioning PCM (powertrain control module).

4. How can I diagnose the OBDII code P1521 in my Isuzu?

- Diagnosing the code may require using a scan tool to check for any stored codes, testing the throttle position sensor, inspecting the throttle body for any obstructions, and checking the wiring connections.

5. How serious is the OBDII code P1521 in an Isuzu?

- While the vehicle may still be operable with this code, it is important to address it promptly to prevent potential drivability issues and further damage to the engine.

6. Can I continue driving my Isuzu with the OBDII code P1521?

- It is not recommended to drive the vehicle for an extended period with this code present, as it may lead to poor performance and potential safety hazards.

7. How can I repair the OBDII code P1521 in my Isuzu?

- Repair options may include replacing the throttle position sensor, cleaning the throttle body, repairing any damaged wiring, or reprogramming the PCM.

8. Will resetting the OBDII code P1521 in my Isuzu make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.

9. Can a DIY enthusiast fix the OBDII code P1521 in an Isuzu?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the issue themselves. However, it is recommended to seek professional help if unsure.

10. How much does it typically cost to repair the OBDII code P1521 in an Isuzu?

- The cost of repairing this code can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.