Code 44, Lean Exhaust Indication: Notes
WARNING: This page is about a different car, the 1992 Pontiac Grand Prix, 1992 Oldsmobile Cutlass Supreme, and 1992 Chevrolet Lumina. However, it is still accessible from the selected car via links, so may be relevant.
CODE 44 ECM TERMINAL & CKT WIRING IDENTIFICATION
| Application | ECM Terminal | Wire Color |
|---|---|---|
| O2 Signal | A16 | Purple |
| O2 Ground | A22 | 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.
NOTE:
Test number refers to number on diagnostic chart.
- Checks to see if O2 sensor is registering a lean condition. Code 44 is set when O2 sensor voltage signal at control module is low (less than .3 volt) for a precalibrated period and system is operating in "closed loop".