2008 chevy impala service traction control


Asked by Mar 23, 2016 at 09:19 PM about the 2008 Chevrolet Impala LT

Question type: Maintenance & Repair

The service traction control lights comes on periodically, even when traction control is turned off.  If cruise is on, it will shut the cruise off.  codes are U0140 lost communication with bcm and U0155 lost communication with instrument panel cluster.  The sensor's on all 4 wheels are good, checked all connections and added di-electric grease to all computers on drivers side. slight reduced power, but no warning lights for that.  Any ideas?  93000 miles

1 Answer


More than likely you have a bad,wheel sensor or the wiring is bad going to it.

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