Codes 21 & 43
03-04-2008, 10:29 AM
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Codes 21 & 43
My check engine light came on for the first time since i got my 90 4runner the other day. 21 & 43 came up. Is it normal to set these at the same time?
21 is o2 sensor and 43 has me baffled its starter signal.
The light came on after i had been driving it all day and i was on the hiway when it came on.
I did do a compression test with the coil wire off, would that possibly set the 43 code? I hadn't checked the codes before i did the test.
21 is o2 sensor and 43 has me baffled its starter signal.
The light came on after i had been driving it all day and i was on the hiway when it came on.
I did do a compression test with the coil wire off, would that possibly set the 43 code? I hadn't checked the codes before i did the test.
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