Mechanics

REPLACEMENT OF O2 SENSOR

2002 Jeep Liberty • 6 cylinder 4WD Automatic • 94,000 miles

What causes the o2 sensor to malfunction
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K brogan
February 14, 2011.




Incorrect air/fuel ratio, contaminates in fuel (water for example).

Any coolant will destroy O2 sensors.

And they do wear out.

Some newer cars use wideband O2 sensors, these give feedback to PCM much more quickly that standard sensors, they are, however, more exprensive.

Realize that just because you have a sensor error, does not mean the sensor is the cause, a contaminated MAF sensor, incorrect fuel pressure, cylinder misfires can also trigger O2 errors.

Mmprince4000
Feb 14, 2011.


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