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Re: Cleaned Crank Sensor, now I get error code... (archive)

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Posted by George on January 05, 2000 at 13:31:40:

In Reply to: Cleaned Crank Sensor, now I get error code... posted by Jeff Goss on January 03, 2000 at 20:12:32:

Only plausible linkage between O2 and Crank Sensor could be when the Crank sensor was "gunked
up" ignition may have been inconsistent causing
the O2 sensor to be exposed to unspent fuel causing premature failure....remote but possible.
Also inconsistent crank position sensing may have caused bad programming of the DME. Would definitely try disconnecting the battery for at
least an hour and try again.
Let me know what gap you set your Crank sensor to.

'90 735il

Last night I cleaned the crankshaft position sensor since I discovered it was covered in oil and motor gunk. After cleaning it the car runs great(as it did before) but the Check Engine light came on the next day, displaying the '1222' code for rich/lean mixture at O2 sensor. THe light has not come on once since last year when the O2 was bad and was replaced by a new Bosch unit. Could the DME be used to the (incorrect) reading of the crank sensor and now that it's clean be confused? I did undo the battery for 5 mins. to reset the DME but the CE light came on again. THe gap on the Crank Sensor seems to be within spec. Any ideas??? THanks.

: Jeff Goss
: '89 535i - soon to have it's own website!

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