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Engine-Codes – Generic – U1008

U1008 Code - Lost Communication With Radiator Shutter

Quick Answer

The U1008 diagnostic trouble code (DTC) indicates that there is a communication failure between the vehicle's onboard computer system and the radiator shutter. Common causes include Faulty radiator shutter motor, Wiring or connection issues between the ECM/PCM and radiator shutter, Malfunctioning ECM/PCM. 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
U1008 indicates Lost Communication With Radiator Shutter.
Common causes
Common causes include Faulty radiator shutter motor, Wiring or connection issues between the ECM/PCM and radiator shutter, Malfunctioning ECM/PCM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code U1008 Description

The U1008 diagnostic trouble code (DTC) indicates that there is a communication failure between the vehicle's onboard computer system and the radiator shutter. The radiator shutter is a component that controls the airflow through the radiator to help regulate engine temperature. When communication is lost with this component, it can lead to issues with engine cooling and potentially impact the vehicle's overall performance.

OBDII Code U1008 - Lost Communication With Radiator Shutter
U1008 Code - Lost Communication With Radiator Shutter

Common Causes of U1008

  1. Faulty radiator shutter motor
  2. Wiring or connection issues between the ECM/PCM and radiator shutter
  3. Malfunctioning ECM/PCM
  4. Corrosion or moisture in electrical connections
  5. Software issues with the vehicle's onboard computer system

Symptoms of U1008

  1. Engine overheating
  2. Reduced fuel efficiency
  3. Illuminated check engine light
  4. Decreased engine performance
  5. Inability to control radiator shutter manually

How to Fix U1008

  1. Begin by performing a visual inspection of the radiator shutter, wiring, and connections for any visible damage or corrosion.
  2. Use a diagnostic scan tool to retrieve the trouble codes and identify the specific issue with the radiator shutter communication.
  3. Test the radiator shutter motor and associated wiring for proper operation and continuity using a multimeter.
  4. Check for any software updates or reprogramming that may be available for the ECM/PCM to address communication issues.
  5. If necessary, replace the radiator shutter motor or repair any damaged wiring or connections to restore communication with the ECM/PCM.

Cost to Fix U1008

The cost of repairing a lost communication with the radiator shutter can vary depending on the specific issue and the vehicle's make and model. In general, the cost of parts for this repair can range from $100 to $300, while labor costs can add an additional $100 to $200. Overall, the total repair cost for this issue is typically in the range of $200 to $500. However, it is important to note that these are rough estimates, and actual costs may vary based on factors such as location, shop rates, and the extent of the repairs needed. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.

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Code U1008 Information for Specific Makes

  • U1008 Chrysler — LIN 1 Bus Steering Column Control Module Electrical Diagnostic
  • U1008 Dodge — LIN 1 Bus Steering Column Control Module Electrical Diagnostic
  • U1008 Hyundai — Lost Communication With Radiator Shutter
  • U1008 Jeep — LIN 1 Bus Steering Column Control Module Electrical Diagnostic
  • U1008 KIA — Lost Communication With Radiator Shutter
  • U1008 RAM — LIN 1 Bus Steering Column Control Module Electrical Diagnostic
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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