Engine-CodesHonda – P1242 Honda

P1242 Honda Code - Throttle Valve Control Motor Circuit 2 Malfunction

Quick Answer

The P1242 Honda code indicates a malfunction in the throttle valve control motor circuit 2. Common causes include Faulty wiring in the throttle valve control motor circuit, Defective throttle valve control motor, Damaged throttle body. 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
P1242 Honda indicates Throttle Valve Control Motor Circuit 2 Malfunction.
Common causes
Common causes include Faulty wiring in the throttle valve control motor circuit, Defective throttle valve control motor, Damaged throttle body.
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 10, 2024
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Code P1242 Honda Description

The P1242 Honda code indicates a malfunction in the throttle valve control motor circuit 2. This means that there is a problem with the electronic control system that regulates the throttle valve in the vehicle. The throttle valve control motor is responsible for adjusting the airflow into the engine, which is crucial for maintaining proper engine performance and fuel efficiency.

OBDII Code P1242 Honda - Throttle Valve Control Motor Circuit 2 Malfunction
P1242 Honda Code - Throttle Valve Control Motor Circuit 2 Malfunction

Common Causes of P1242 Honda

  1. Faulty wiring in the throttle valve control motor circuit
  2. Defective throttle valve control motor
  3. Damaged throttle body
  4. Malfunctioning electronic control unit (ECU)

Symptoms of P1242 Honda

  1. Erratic acceleration or deceleration
  2. Poor engine performance
  3. Reduced fuel efficiency
  4. Stalling or hesitation while driving
  5. Rough idling or difficulty starting

How to Fix P1242 Honda

  1. Diagnose the issue by using a scan tool to retrieve the trouble code and inspecting the throttle valve control motor circuit for any visible damage.
  2. Check the wiring and connections in the throttle valve control motor circuit for any loose connections or corrosion. Repair or replace any damaged wiring.
  3. Test the throttle valve control motor to determine if it is functioning correctly. Replace the motor if it is faulty.
  4. Inspect the throttle body for any signs of damage or wear. Clean or replace the throttle body if necessary.
  5. Clear the trouble code from the ECU's memory and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P1242 Honda

The typical repair costs for addressing a P1242 Honda code can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check local rates for a more accurate estimate. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops often charge less.

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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.

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