DTC P0605/EFI 112, DTC P1326/EFI 112, DTC P1327/EFI 112, DTC P1328/EFI 112, DTC P1329/EFI 112, DTC P1401/EFI 112, DTC P1403/EFI 112 & DTC P1404/EFI 112: Diagnosis

If ECM detects a fault in ROM/EPROM or RAM memory circuits, ECM temperature sensor circuit, knock control circuit, or ECT sensor circuit's NTC coupling, DTC 112 is set. If DTCs 432 and 513 are also present, go to testing for those DTCs. If these DTCs are not present, go to next step.
If fault is permanent and signal is faulty, replace ECM. If fault is intermittent and signal is faulty, erase DTC. If DTC reoccurs, check ECM connector for good terminal contact. If terminal contact is okay, replace ECM.