Primary Oxygen Sensor - Heater circuit malfunction

does this mean that hte O2 sensor itself isnt working? or just the heating part? Cuz I hope my engine isnt running lean..... and detonates.....

 

Your car wouldn't run lean, it would run way rich. Be ready for your gas mileage to go down... way down.

Not sure about the fix tho...

 

but nothing should happen to the engine in the mean time, while I try to get it fixed?

 

On my '95, DTC41 is the heater circuit, not the sensor itself. Check the heater of the O2 sensor (terminals 3 & 4). It should be between 10 to 40 ohms, & neither one should have continuity to ground. Terminal 4 should not have continuity to either one of the sensor leads (1 & 2).

Then check to see if there's voltage supplied to terminals 3 & 4 when the ignition is turned on. There's also connectors at both shock towers that are in the circuit.

Edit - More for LsPower...
The oxygen sensor has a built-in heater so it begins working sooner after you start the engine. Error #41 refers to the heater or its power circuit. If the oxygen measurement itself were screwed up it would throw a different error code. (#1?)

Check to see if the heater itself is OK (10 to 40 ohms). If not, replace the O2 sensor 'cause the heater is built in.

Then make sure its getting 12v power when the ignition is turned on. In '95 that's the yel/blk & orn/blk wires. If not, then you gotta figure out why not. That's the fun part.

If you still don't understand, then maybe you can show this to your mechanic.

Warning, the wire colors & maybe even the DTC numbers themselves might be different for different years... YMMV.



[Modified by JimBlake, 4:14 PM 3/7/2003]

 

Im sorry Im not sure what you are saying. This happened to me too.