Need expert advice
09-18-2008, 03:38 PM
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Mercedes c230
Need expert advice
I took C230, 2006 to Pineville NC stealership(no warranty). This is what they found:
CEL was caused by:
-0745 self-adaptation of mixture formation for enrichment at idle for the right cylinder bank is above the permissible limit(P0171)
-0749 same for the left side(P0174)
-2091 the mixture in the right cylinder bank is too lean when idling
-2095 same for left bank
According to their report, self-adaptation at idle is supposed to be between -4.5% and 4.5%. they measured 6%. Fuel sample was OK. They reset self-adaptation after what engine started to shake, CEL came back on and threw misfire for 4 cylinders. before this, car never had misfire code.Intake manifold pressure(which has to be less than 500) was measured at 610(at fauld codes decription it was 670 and as high as 890.
Anyone has idea what is going on with this engine?
They replaced MAF sensor but that did not help.
Thanks: Dan
CEL was caused by:
-0745 self-adaptation of mixture formation for enrichment at idle for the right cylinder bank is above the permissible limit(P0171)
-0749 same for the left side(P0174)
-2091 the mixture in the right cylinder bank is too lean when idling
-2095 same for left bank
According to their report, self-adaptation at idle is supposed to be between -4.5% and 4.5%. they measured 6%. Fuel sample was OK. They reset self-adaptation after what engine started to shake, CEL came back on and threw misfire for 4 cylinders. before this, car never had misfire code.Intake manifold pressure(which has to be less than 500) was measured at 610(at fauld codes decription it was 670 and as high as 890.
Anyone has idea what is going on with this engine?
They replaced MAF sensor but that did not help.
Thanks: Dan
