Engine-CodesGeneric – P1658

P1658 Code - Electronic Throttle Control System Control Relay ON Malfunction

Quick Answer

The P1658 code indicates a malfunction in the Electronic Throttle Control System Control Relay being stuck in the ON position. Common causes include Faulty Electronic Throttle Control System Control Relay, Wiring issues or shorts in the circuit, Malfunction in the Electronic Throttle Control System. 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
P1658 indicates Electronic Throttle Control System Control Relay ON Malfunction.
Common causes
Common causes include Faulty Electronic Throttle Control System Control Relay, Wiring issues or shorts in the circuit, Malfunction in the Electronic Throttle Control System.
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.
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P1658 Description

The P1658 code indicates a malfunction in the Electronic Throttle Control System Control Relay being stuck in the ON position. The Electronic Throttle Control System (ETCS) is responsible for regulating the throttle opening in modern vehicles, improving fuel efficiency and performance. The control relay is a crucial component that controls the activation and deactivation of the throttle system. When this relay gets stuck in the ON position, it can lead to a variety of issues with the vehicle's performance.

OBDII Code P1658 - Electronic Throttle Control System Control Relay ON Malfunction
P1658 Code - Electronic Throttle Control System Control Relay ON Malfunction

Common Causes of P1658

  1. Faulty Electronic Throttle Control System Control Relay
  2. Wiring issues or shorts in the circuit
  3. Malfunction in the Electronic Throttle Control System
  4. Corrosion or damage to electrical connections
  5. Software glitches or programming errors

Symptoms of P1658

  1. Unintended acceleration
  2. Rough idling or stalling
  3. Difficulty maintaining speed
  4. Poor fuel economy
  5. Vehicle going into limp mode

How to Fix P1658

  1. Diagnose the exact cause of the issue using a scan tool to retrieve the trouble codes and perform a thorough inspection of the ETCS components.
  2. Replace the Electronic Throttle Control System Control Relay if it is found to be faulty.
  3. Check and repair any wiring issues or shorts in the circuit.
  4. Inspect and clean electrical connections to ensure proper contact.
  5. Reset the throttle system and perform a relearn procedure to calibrate the new relay and ensure proper functionality.

Cost to Fix P1658

The typical repair costs for addressing a P1658 code can range from $150 to $400, depending on the extent of the issue and the cost of replacement parts. This estimate includes the cost of the Electronic Throttle Control System Control Relay and labor charges. It is important to note that diagnosis time and labor rates at auto repair shops can vary, so it is recommended to check with local shops for a more accurate estimate.

Tech Notes for P1658

















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Code P1658 Information for Specific Makes

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 P1658 Code

1. What are the common symptoms of OBDII code P1658?

- Common symptoms include the engine stalling, lack of acceleration, or the vehicle going into limp mode.

2. What does the OBDII code P1658 indicate?

- The code P1658 indicates a malfunction in the Electronic Throttle Control System Control Relay ON.

3. What are the possible causes of code P1658?

- Possible causes include a faulty electronic throttle control relay, wiring issues, or a problem with the throttle control system itself.

4. How can I diagnose the cause of OBDII code P1658?

- Diagnosing the code typically involves checking the electronic throttle control relay, inspecting the wiring for any damage, and testing the throttle control system components.

5. Can I still drive my vehicle with OBDII code P1658?

- It is not recommended to drive the vehicle with code P1658 as it can lead to unsafe driving conditions and potential further damage to the engine.

6. How can I repair OBDII code P1658?

- Repairing code P1658 may involve replacing the electronic throttle control relay, repairing any damaged wiring, or addressing issues with the throttle control system.

7. Is it possible to reset OBDII code P1658 without fixing the underlying issue?

- While you can clear the code with a diagnostic tool, it is important to address the underlying issue to prevent the code from reoccurring.

8. Can a DIY enthusiast fix OBDII code P1658?

- Depending on your experience and tools, you may be able to troubleshoot and repair code P1658 yourself, but it is recommended to seek professional help for accurate diagnosis and repair.

9. How much does it cost to repair OBDII code P1658 at a repair shop?

- The cost of repairing code P1658 can vary depending on the specific issue, parts needed, and labor rates at the repair shop. It is best to get a quote from a trusted mechanic.

10. Are there any preventative measures to avoid OBDII code P1658 in the future?

- Regular maintenance checks, keeping the throttle system clean, and addressing any warning signs early can help prevent OBDII code P1658 from occurring.

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