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1999 Toyota Camry

Question: Why is PO 401 code still not clearing? '99 Camry

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53Fleet, Palm Desert, CA, December 14, 2011, 20:29
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I am troubleshooting my daughter's '99 Camry 4 cyl. PO401 code problem. The first time it came on it went off the following day. Came on, then off. Now it remains on. So far I have: cleaned the EGR valve, replaced the modulator and vacuum switching valve, all genuine Toyota parts. I cleaned the throttle body. Cleared the code. Still throwing 401. I did vacuum test to EGR, engine stalls when vacuum applied. Since it stalls I would guess that I don't need to clean the EGR tube? What else could it be? Any help would be greatly appreciated.

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  • Answer #1

    mastertech6371 December 14, 2011, 20:45
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    clean the tube. it may be all about volume. did you check the old solenoid for a short?? if it shorted, it may have taken out the pcm as well.

    Roy

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