My 2001 Isuzu Rodeo has 124K miles on it. Failed smog test for first time today and threw codes: P0463 (Fuel level sensor CKT High Input), P0300 (Random/Multiple misfire), P0155 (O2 sensor heater fault, bank 2 sensor 1) and P0154 (O2 sensor CKT Inactive, bank 2 sensor 1).
I think I could get a tune-up and clear P0300 but the sensor codes are concerning to me. My check engine light has been on for the past year with no resolution from two different mechanics on making it work properly and what needs to be done. Now I have failed the smog test and need to figure this out quickly. My idle emission tests all passed but my functional check (above) obviously did not. I am a loss as to what to do to fix the problem since I am having trouble finding mechanics in my area who know how to fix this. Any advice would be highly appreciated!
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Re: Failed Smog Test - 4 codes for 2001 Isuzu Rodeo
Tune it up and replace the 02 sensor that keeps setting the codes bank 2 sensor 1. Have your oil and filter changed right before you go for a retest to. That will clear up 3 codes P0300, 0155 and 0154. You might have to replace the fuel sending unit to get rid of P0463 but if the gauge works OK I'd leave it alone.
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No this is not right. If you remove the battery everything resets anyways. If they are talking about relearn procedure, it should only require 50 miles. But if the light is on than either they did something wrong, created another problem, or there was already another one existing. Have the code read and let me know what it is. I'm in Ca too and used to prep european cars for smog, so I do know what I'm looking for. How did the rest do? What were the readings(if possible)?
On your way back to test put it in second or third gear and floor it probably needs a good clean out. Had one failed the smoke test myself a few years ago the man in the test center put it in 1st gear and floored it for about 10 min's around the yard. When it failed the test I told him I couldnt understand the fail as I never drove it hard or abused it in any way. He told me I was abusing it as it needs a good clean out. Worth a try as it work's for me all the time.
could be many things. Could be choke causing problems, could be engine temperature sendor bad, could be EGR. When you mean engine light comes on do you mean service engine light coming on? Probably has codes set which means something is gone wrong and setting a code that tells the tech what is wrong or what to look for. Have you changed your fuel filter lately?
Go to AutoZone or Kragen and get a $9.00 bottle of PASS ANY SMOG TEST or double
your money back (keep your receipt). You just pour it into your gas tank at a FILL UP and run
that gas down then refill your tank and take your Smog Test. It will pass. What state are you in??
What are your smog test numbers??
MikNas in California