I did a code check and I got the codes 511, 327, 452, 538. I figure the 538 is because I have 3.73 gears in the rear and the speedometer and RPMs may be off a little. Anywho I changed the speedometer sensor last week because my speedometer needle was jumping around like crazy. When I changed the speedometer sensor it fixed the jumping needle which may have taken care of the 452 code. I also checked the EGR valve which had vacume and changed the EGR valve position sensor today hoping to fix the 327 code. But the 511 code baffles me!?! Could the 511 code be because I have a programed chip im my car?
511= read only memory test failure
327= EGR valve position circuit below minimum voltage/EVP-EPT circuit below minimum voltage
452= Vehicle speed sensor signal fault
538= Insufficient RPM change during KOER dynamic response test
511= read only memory test failure
327= EGR valve position circuit below minimum voltage/EVP-EPT circuit below minimum voltage
452= Vehicle speed sensor signal fault
538= Insufficient RPM change during KOER dynamic response test