Acura is confused

This TSB applies to 2009-2010 Acura TL models. The MIL may illuminate with DTC P2118 (throttle control system) stored. The PCM misinterprets ETCS (electronic throttle control system) inputs as a malfunction.

The corrective action involves updating the PGM-F1 software with the HDS. Note that HDS software version 2.022.104 or later must be used.


  1. Update the PGM-1 software with the HDS.
  2. Start the engine. If DTC P2118 recurs, this TSB does not apply. Continue with troubleshooting. If the DTC does not appear, the repair is complete.
Tags: Acura 
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