AutoCodes – Generic – P1658

P1658 Code - Electronic Throttle Control System Control Relay ON Malfunction

Quick Answer

The Powertrain Control Module (PCM) controls the throttle valve opening. Common causes include Faulty Electronic Throttle Control System (ETCS) Relay, Electronic Throttle Control System Relay harness is open or shorted, Electronic Throttle Control System Relay 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: P1658 indicates Electronic Throttle Control System Control Relay ON Malfunction.
Common causes: Common causes include Faulty Electronic Throttle Control System (ETCS) Relay, Electronic Throttle Control System Relay harness is open or shorted, Electronic Throttle Control System Relay 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 16,143

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 Mar 26, 2024

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P1658 Description

The Powertrain Control Module (PCM) controls the throttle valve opening. The system includes the throttle actuator, the throttle valve, Throttle Position (TP) sensors A and B, the Accelerator Pedal Position (APP) sensor, the Electronic Throttle Control System (ETCS) control relay, and the PCM. The APP sensor is operated via the throttle cable to determine the accelerator opening value when the driver presses the accelerator pedal. The accelerator pedal opening value is converted to a signal in the APP sensor and transmitted to the PCM to compute the target position. The PCM determines the throttle valve target position according to the signal received and operates the throttle actuator to move the throttle valve to the target position. The actual throttle valve position is determined by TP sensor A (installed in the throttle body). When the voltage is applied from the ETCS control relay to the IG1ETCS terminal for a set time after the ETCS control relay is turned off, the PCM detects a malfunction in the ETCS control relay power switch, and a DTC is stored.

OBDII Code P1658 - Electronic Throttle Control System Control Relay ON Malfunction - AutoCodes.com — P1658 Code - Electronic Throttle Control System Control Relay ON Malfunction

What does this mean?

What are the Possible Causes of the DTC P1658?

Faulty Electronic Throttle Control System (ETCS) Relay
Electronic Throttle Control System Relay harness is open or shorted
Electronic Throttle Control System Relay circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1658?

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

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1658 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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Get the P1658 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1658 Acura — Electronic Throttle Control System Control Relay ON Malfunction
P1658 Audi — CAN Data Bus Cruise Control Incorrect Signal
P1658 Buick — Fuel Injector Control Module Driver Performance
P1658 Cadillac — Fuel Injector Control Module Driver Performance
P1658 Chevrolet — Fuel Injector Control Module Driver Performance
P1658 GMC — Fuel Injector Control Module Driver Performance
P1658 Honda — Electronic Throttle Control System Control Relay ON Malfunction
P1658 Saab — Turbocharger Bypass Valve Open Circuit / Short To Ground
P1658 Toyota — Turbocharger Bypass Valve Open Circuit / Short To Ground
P1658 Volkswagen — CAN Data Bus Cruise Control Incorrect Signal

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.