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Dreaded reduced performance error

  #1  
Old 12-03-2018, 03:10 PM
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Default Dreaded reduced performance error

Okay vital stats: 2004 s60 T5 AWD with 208,000 miles. Length of ownership, maybe a month. Came with CPS, TPS, and MAF codes and a check engine light.

So far I have replaced the CPS and TPS and replaced plugs (last step was probably a waste the plugs I took out looked good). After replacing the CPS I noticed no change. After changing the TPS I noticed a BIG change, much better throttle response and much smother shifting. I am however still getting at least 2 reduced performance messages on almost all drives. I am NOT a mechanic and know zip about Volvos, any idea on what else could cause this error? It seems to trigger when coming off low/no throttle and rolling onto it. One strange note, the error doesn't seem limit performance much if any. Even when the CEL was on the car seemed to run well.

Thanks,
Dave

P.S. yes I've searched on the subject but much of the info was old
 
  #2  
Old 12-04-2018, 07:26 AM
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Well inside of 40 miles the CEL light is back on. I really want to like this little car but I'm so frustrated right now. Hoping to find a friend with an OBD II scanner that will provide more info than the $40.00 wonder at the auto parts store. If anyone has any ideas I'd appreciate the help.
 
  #3  
Old 12-10-2018, 12:00 PM
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So after some investigation I found the the bracket that holds the CPS in place was not secure, one of the bolts had backed out of the block. I tightened up the bracket and now for the first time ever can go a while with zero codes. Then after a bit the reduced performance message comes back and I have a pending CPS code. Next step is to find enough time to check the timing on the car.
 
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