What is CID 167 & How to Solve It?

What is CID 167:

CID 167 refers to a problem with the vehicle's transmission system, particularly the transmission control module (TCM). The ECM detects that the TCM is malfunctioning, leading to poor shifting, loss of acceleration, or failure to switch gears.

‍

Why This Happens:

• Faulty transmission control module.
  
• Shorted or damaged wiring in the TCM circuit.
  
• Low transmission fluid levels.
  
• Loose or corroded connectors.
  
• ECM failure to process data from the TCM.
  
  

How to Fix It:

1. Inspect the TCM for faults or damage.
   
2. Check wiring and connectors for visile damage or corrosion.
   
3. Ensure proper transmission fluid levels.
   
4. Reprogram or replace the TCM if necessary.
   
5. Perform a full system diagnostic check to ensure proper transmission operation.
   
   

How to Avoid It Before It Happens:

• Perform regular transmission system checks.
  
• Inspect transmission fluid levels regularly.
  
• Keep connectors clean and secure.
  
• Perform routine diagnostics to monitor TCM health.
  
• Clue’s fleet management software helps monitor transmission systems and prevent shifting or performance issues.