Having problems with your 1996 Jeep Cherokee Country ?

Code 21,43,and 42

\015 I do not have a manual for my Jeep so I need to know where the Oxygen sensor is located and if this is what I need to fix my problem from code 21?\015 Posted / edited by AnonymousUser on : 19-11-2018

Answers :

You have two oxygen sensors but 21 is upstream sensor. This is the sensor between engine and catalytic converter. There is three possible problems that it could be.
\0121 oxygen sensor input voltage maintained above the normal operating range.
\0122 no signal at 02 2/1 sensor
\0123 oxygen sensor input voltage sustained above thenormal operating range. What all this means is you need to replace the sensor.
\012when getting the replacement this is your O2 2/1 sensor.
Repair Help & Product Troubleshooting for 1996 Jeep Cherokee Country

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