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1989 GMC SAFARI 4.3L MIL Lamp on, failed o2 sensors
Van returned to us at 166k miles, intermittent MIL light on freeway, no other complaints. 02 sensor always read .2v with propane added or vacuum leak, block learn high. Replaced O2 sensor with AC Delco, light now out on freeway drive, O2 sensor switching n...
FIX posted 4/22/1999
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Related Documents & Media 
| VIN | 1GKDM1528K |
| Engine | 4.3 L / 6 cyl |
| Symptoms | MIL Lamp on, Failed O2 Sensors |
| Occurs | Hot, Cruise, Intermittently, on Freeway |
Trouble Codes
| 44 | lean exhaust |
Message Closed w/FIX
Vehicle Data
1989 GMC SAFARI
| VIN | 1GKDM1528K |
| Engine | 4.3 L / 6 cyl |
| Symptoms | MIL Lamp on, Failed O2 Sensors |
| Occurs | Hot, Cruise, Intermittently, on Freeway |
Trouble Codes
| 44 | lean exhaust |
Video