What is CID 1002 & How to Solve It?

What is CID 1002:

cid 1002 refers to a problem with the engine coolant temperature sensor circuit. when the sensor fails, the ecm cannot monitor coolant temperature properly, which can result in engine overheating or poor fuel efficiency.

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Why This Happens:

• faulty coolant temperature sensor.
  
• shorted or open wiring.
  
• corroded or loose connectors.
  
• low coolant levels.
  
• ecm failure to interpret sensor data correctly.
  
  

How to Fix It:

1. inspect the coolant temperature sensor and wiring for damage.
   
2. test the sensor’s resistance and voltage against manufacturer specifications.
   
3. check coolant levels and top up if necessary.
   
4. replace the faulty sensor if necessary.
   
5. clean or replace corroded connectors.
   
   

How to Avoid It Before It Happens:

• check coolant levels regularly.
  
• inspect sensors and wiring during service.
  
• perform diagnostic checks to monitor engine temperature.
  
• clue’s equipment maintenance services track coolant health and help prevent overheating before it occurs.