Engine-CodesGeneric – U1135

U1135 Code - Invalid Or Missing Data For Ignition Switch / Starter

Quick Answer

The U1135 code indicates that there is invalid or missing data for the ignition switch or starter in the vehicle's system. Common causes include Faulty ignition switch, Faulty starter motor, Wiring issues. 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
U1135 indicates Invalid Or Missing Data For Ignition Switch / Starter.
Common causes
Common causes include Faulty ignition switch, Faulty starter motor, Wiring issues.
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 09, 2024
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Code U1135 Description

The U1135 code indicates that there is invalid or missing data for the ignition switch or starter in the vehicle's system. This can have various implications for the vehicle's performance and functionality. The ignition switch is a key component that allows the driver to start the vehicle by turning the key in the ignition. The starter motor is responsible for turning the engine over to initiate the combustion process and start the vehicle. When there is invalid or missing data related to these components, it can lead to issues with starting the vehicle, as well as potential problems with the overall electrical system.

OBDII Code U1135 - Invalid Or Missing Data For Ignition Switch / Starter
U1135 Code - Invalid Or Missing Data For Ignition Switch / Starter

Common Causes of U1135

  1. Faulty ignition switch
  2. Faulty starter motor
  3. Wiring issues
  4. Computer system malfunction
  5. Sensor malfunction

Symptoms of U1135

  1. Difficulty starting the vehicle
  2. Engine cranks but does not start
  3. Intermittent starting issues
  4. Dashboard warning light indicating a problem with the ignition switch or starter

How to Fix U1135

  1. Diagnose the issue using a diagnostic scanner to retrieve the specific code and pinpoint the problem area.
  2. Inspect the ignition switch and starter motor for any visible signs of damage or wear.
  3. Check the wiring connections and repair or replace any damaged wires or connectors.
  4. Test the vehicle's computer system and sensors to ensure they are functioning correctly.
  5. Replace the faulty ignition switch or starter motor if necessary.

Cost to Fix U1135

The cost of repairing the U1135 code can vary depending on the specific cause of the issue and the make and model of the vehicle. In general, the cost of parts for replacing an ignition switch or starter motor can range from $100 to $300, while the cost of labor can range from $100 to $300 as well. Overall, the total repair cost for addressing the U1135 code can range from $200 to $600, including parts and labor. It's important to note that these are rough estimates, and actual repair costs may vary based on factors such as location, vehicle age, and shop rates. It's recommended to consult with a qualified mechanic to get a more accurate cost estimate for repairing this issue.

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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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