The car is using more gas and the check engine lit is on code is po522 and po523. Can that cause this problem
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2007 Chevrolet Impala SS Question: Will the oil pressure switch cause the motor not to change from 8 to 4 cylinder
Answer #1Greg's Orange Auto (10981 Answers) , Orange, CA - (714) 361-9355globalhelper September 16, 2013, 12:56Master
the wrong thickness oil can cause this issue. i rec seeking diag and est from your mech
Answer #2ChevyASE September 18, 2013, 01:27Journeyman
Yes. It can cause issues with the AFM system. AFM will be disabled if the system sees (or thinks it sees) low oil psi. Check the wires to the switch and make sure they are not broken or shorted anywhere. If they are not, then replace the Oil PSI switch. If there are still issues after this, then you will need a scan tool (not a code scanner) for diag.