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2002 S60 Reduced Engine Performance Message Due to Weak RPM Sensor Signal S60

posted by  someone claiming to be SwedishChef on  Thu Mar 29 05:19 CST 2007 [RELATED]

Greetings All,

My '02 s60 has been in the Dealership for three days now. Car was showing "Reduced Engine Performance" message under load [me driving without kids in car] and occasional drawn-out starts. Otherwise ran OK. Car has 140,000mi on it - have owned since new & it has been well maintained.

Car needed a new MAF - I replaced. CEL came on -- Autozone reset it - code was "low fuel at startup".

Has shown code 5022 for RPM sensor for awhile, but intermittent. Dealer Tech replaced sensor, which was covered with fuzz [shavings] and had a bit of a dent in the end. Code went to permanent.

Tested the wire harness since its getting a weak signal from the RPM sensor. They called Volvo-and got some tips :

They cleaned corrosion from a few pins under the ECU. They tore through the harness 3 or 4 times. Their suggestion is to pull the trans to check the flywheel and the electrical connection between the engine and the trans.They say it might be the flywheel teeth. That's a HUGE labor bill considering that the car still runs.

My thought is, why not put a capacitor or some electrical doo-dad in line to even out the signal??

Anyone an EE? I went to Lehigh, but I studied business.

I'll get the electrical signal specs and post them after I pick the car up tonight.


Thanks for any help that is offered,
Brian






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