2000 Honda Odyssey Q&A
2000 Honda Odyssey Question: CHECK ENGINE LIGHT
I have 2000 Honda Odyssey LX. The check engine light came on several months ago. I followed what the handbook said "after 2 or 3 gas tank fills it will go off" and it did - for a while. Then it would go out and come on intermittently. For the last month it has been on all the time. The van runs great, but twice in the last 6 months it did not start, everything went dead, but it did start after leaving it for 10 minutes. Went for smog and it failed, supposedly for codes P0401 (ERG flow insufficient), P1456 and P1457. The station said one of those codes was for computer, but in all his years working for Honda (he doesn't work there now, this was not a Honda dealer/station) he has only replaced 3 computers. He went ahead and replaced ERG VALVE (EGV658) and the AIR BYPASS VALVE (17310-SOX-A02). It passed the smog test - but it cost $581. After 200 miles of driving the LIGHT IS BACK ON. I have read several site forums and will try injector/valve fluid, fill it with good gas (Shell) and disconnect/reconnect the diagnostic connector under the dash. Is it possible that they replaced good parts in an effort to fix the problem or were those codes indicative of those parts? I dread to think what a new computer would be to replace. Anyone know the going rate? And can I change the computer myself? Thanks. - billy_2651
It sounds like the shop isn't sure about what they are finding during their diagnosis, and that is not good. This needs to go to a shop that will diagnose this properly. Find a Gold Shield smog station and have them perform a diagnosis. - Bret Bodas
Sounds frustrating. I'm sorry you are having the experience you are. P0401 is indeed insufficient EGR flow. But P1456 and P1457 are Evaporative Emission system leaks that do not appear to have ever been addressed, by your account. Have you had the starting problem lately, or is that part solved? If it is solved, the air bypass valve probably helped you there. The EGR valve probably fixed the P0401 (unless it has returned...pull codes and find out...). But the P1456 and P1457 would be there for detecting leaks in the Evaporative Emissions system, and should be pursued. Probably will not need a "new computer"... - DaveJHM
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