| Author | Message | ||
     Brian Starr (Starr) New Member Username: Starr Post Number: 1 Registered: 04-2003 |
Can anyone explain this to me? Any suggestions for repair would also be helpful. Thanks in advance. | ||
| marc olivares (Pugs) Member Username: Pugs Post Number: 138 Registered: 12-2002 |
brian, first off, were there any other soft codes stored in your ecu and what's the mileage on your vehicle. your O2 sensors are electrically heated in order to bring them up to operating temp as soon as possible (usually under 5 sec). the ecu sends a voltage to the O2 sensor which then goes through a resistor (which is the heating element) and back to the ecu for ground. the ecu monitors the resistance that the element produces as a safety mechanism to insure that the sensor is functioning correctly. The industry has placed a 100K miles lifespan on O2 sensors, some go longer, some don't, but that seems to be a good rough estimate. depending on the mileage, i would replace them all. if this is a low milage vehicle, look @ the uprstream (before cat. sensors) and start with the obvious; loose/dirty connections, next check the ohms resistance of the heating elements, check for good ecu grounds, etc...if all looks good time to buy an O2 sensor (or 4) unless there are other codes that lead you in another direction. good luck marc |
