Help with Check Engine Light? - Honda Prelude Forum

itzroyal · 09-03-2008, 08:29 PM

I have a 2001 SH. The check engine light have been coming on a lot lately within the past 1/2 year. Each time, it ran a different code, like missing cylinders, catalytic converter, etc... I have already did a tune up and change the cat already but these error codes keep popping up. My mechanic and I are both stomp and think it may be a problem with the car's computer/sensor. Any suggestion/input on this situation would be greatly appreciated!

Jason01LUDE · 09-04-2008, 10:57 AM

Have you replaced the 2nd O2 sensor? (Behind the cat)

itzroyal · 09-04-2008, 01:52 PM

Yes, I changed both o2 sensor within the past 1/2 year.

Jason01LUDE · 09-04-2008, 03:50 PM

i would try the 2nd one again. my car was doing the same thing and that fixed it

itzroyal · 09-04-2008, 04:17 PM

were u also getting missing cylinder codes and cat. converter also? or only for a 02 sensor?

Jason01LUDE · 09-04-2008, 04:26 PM

I was getting all three but not at the same time

itzroyal · 09-11-2008, 01:10 PM

anyone has any other suggestions or input on my current situation? Would like to get a few more opinions

Danomite · 09-11-2008, 06:24 PM

How does your car idle? Is it pretty rough? Does your exhaust make a putt putt putt sound when it's idling? If you can't hear it then put your hand over the exhaust and see if it's a smooth flow or not. Let me know.

Solid · 09-11-2008, 07:03 PM

Quote:

Originally Posted by itzroyal

were u also getting missing cylinder codes and cat. converter also? or only for a 02 sensor?

Quote:

Originally Posted by Jason01LUDE

i would try the 2nd one again. my car was doing the same thing and that fixed it

Quote:

Originally Posted by Jason01LUDE

I was getting all three but not at the same time

The secondary O2 sensor will not change the way your cars runs/performs. Meaning it would no cause misfires or issues like that.

It is simply there to ensure the catalytic converter is present and working.

itzroyal · 09-12-2008, 09:59 AM

no rough idle..

itzroyal · 09-12-2008, 10:00 AM

so if is not the secondary o2 sensor.. then i am stomp.. back to square one..

Danomite · 09-12-2008, 10:34 AM

What was all changed when you did the tune up? Have your mechanic done a compression check to make sure everything is good with the engine? I would try that if he hasn't.

itzroyal · 09-12-2008, 10:45 AM

The tune up includes: pcv valve, spark plugs, ignition wires, distributor cap and rotor, and both 02 sensor. Right after the tune up was done, I did a emission test the following week for my vehicle and passed.