Code 45, Rich Exhaust Indication: Notes
CODE 45 ECM TERMINAL & CIRCUIT WIRING IDENTIFICATION
| Application | ECM Terminal | Wire Color |
|---|---|---|
| O2 Signal | D7 | Purple |
| O2 Ground | D6 | Tan |
O2 sensor acts like an open sensor circuit and produces no voltage when exhaust temperature is less than 600°F (316°C). An open sensor circuit or cold sensor causes "open loop" operation.
Code 45 indicates a rich exhaust. Diagnosis should begin with fuel pressure, leaking injector, HEI shielding (ground), vapor canister fuel saturation, coolant sensor, MAP sensor, O2 sensor contamination and TPS intermittent output.
NOTE:
Test number refers to number on diagnostic chart.