where is pcm located on 2004 Mitsubishi outlander

This could indicate a faulty pcm but I wouldn't jump to that conclusion without some electrical testing. If you don't normally work on automotive electronics it's best to have this diagnosed at a shop. Use this link to find a good shop near you. https://repairpal.com/repair-shops Alex

https://www.engine-codes.com/p0606_mitsubishi.html Possible causes Engine Control Module (ECM) Harness power supply circuit is open or shorted Engine Control Module (ECM) Programming Faulty Engine Control Module (ECM) Tech notes Check the ECM fuse, if fuse is OK try erasing the code first and if the code comes back you may have to reprogram or replaced the ECM.