Throwing CELS: 21,27,71
11-02-2011, 11:01 AM
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Throwing CELS: 21,27,71
Ive got an 89 toyota pickup single cab 22RE, bought it with the CEL on ran the codes and got 21, 27, and 71. These are the O2 sensors and something to do with the EGR from what i can see. Should I just replace all these or could there be another reason these are all being thrown? Thanks in advanced for any input.
11-02-2011, 11:45 AM
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It wouldn't surprise me much if there was there was alot jimmy rigged on the truck when I got it. Any idea which wires from the ECU go to these items? And other than tracing each one and checking for breaks is there any other way to test them? I know for a fact that the wiring harnesses for both O2 sensors are plugged in and exist at least until they disappear into the frame but no idea on the EGR wiring.
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