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Discussion Starter · #1 ·
Hello, I have a 2006 Ridgeline with about 96K miles. Two days ago the engine light (the one that looks like a little orange engine) came on while I was driving down the road. It has remained on ever since.

The manual indicates it could be that something is malfunctioning with the emission system/controls and that I need to take it in soon as it could lead to serious problems if not addressed.

An ominous foreboding.. Otherwise, the truck seems fine. I am always skeptical of problems I cannot see/hear/feel/smell for myself, and if I take it in and they tell my I'll have to spend $1000 to replace my exhaust system, I will always feel a sense of doubt for taking them at their word..

Any advice? thanks!
 

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Buy a scanner or take it to an auto zone type that will scan it for you. That will tell you why it's on.
 

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Could be a hole in a valve too. : )

Better safe than sorry. Is she running ok?
 

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You really don't want to continue running an engine with Check Engine light on. It's not that hard to check it out.... could be nothing, and it could be serious. You want to know.... or at least you need to know.
It's not like you're stuck paying for repairs, just because you get a diagnostic. If you can't do it yourself, at least let the dealer plug it in & tell you what's wrong. Then you can decide what to do from there.... including driving it back home after just paying for the diagnostic service.
 

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You really don't want to continue running an engine with Check Engine light on. It's not that hard to check it out.... could be nothing, and it could be serious. You want to know.... or at least you need to know.
It's not like you're stuck paying for repairs, just because you get a diagnostic. If you can't do it yourself, at least let the dealer plug it in & tell you what's wrong. Then you can decide what to do from there.... including driving it back home after just paying for the diagnostic service.

What he said^^^^

Plus the check engine light on Honda vehicles is very sensitive to emissions malfunctions...even minor ones including bad gas and fuel evap recovery. Every check engine I've ever had is related to a sensor or catalytic converter failure which had nothing at all to do with the engine itself. Unfortunately I think the "check engine" indicator is purposely vague...so little old ladies and soccer moms will take their cars to the dealer for service.

These systems interact so it is best to get it fixed. Letting it go can damage other components like catalytic converters, and negatively affect fuel efficiency. Not even mentioning air pollution. I know, I hate that dang light too......
 

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Discussion Starter · #6 ·
Ok, went to Advanced Auto Parts and they lent me their scanner. Attached are the two engine codes that were produced. I would be grateful for any info into the significance of these readings as it would relate to the orange engine light being on. Thanks!
 

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Gas cap bad? Loose? Probably a sensor also.
 

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Discussion Starter · #9 · (Edited)
Thanks for the replies.

I see that the PO420 code is that catalytic converter might be bad. I am not someone who can fix that himself. So, I guess I have to go to a service specialist to get it replaced. Correct?


(The other code appears to be a bad gas cap (less concerned with that)).


So, how much is this catalytic converter issue going to cost me? Thanks for any information!
 

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Thanks for the replies.

I see that the PO420 code is that catalytic converter might be bad. I am not someone who can fix that himself. So, I guess I have to go to a service specialist to get it replaced. Correct?


(The other code appears to be a bad gas cap (less concerned with that)).


So, how much is this catalytic converter issue going to cost me? Thanks for any information!
If you go to Honda for the cat, stop by the bank on the way and update your loan application. Guessing $600-800. Indie shop $300-400. You have to be careful because the Honda emission system is fussy and a marginal aftermarket cat may not work or it will work for a short while. Be sure to get a good guarantee from the shop you go to. You may luck out and it will be a sensor. The evap emission code can also be generated by overfilling the gas tank. I top off my tank and have never had a problem but I have seen it on other models. Call Honda first and ask if the emission system is warranted for 100K. You may get lucky.
 

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Before you do anything, clear the light and run an a tank of the next higher grade octane through your tank. Maybe even add a fuel additive too. I had the same code and it hasn't come back since. I guarantee any dealer will just automatically tell you you need a new cat. It's a cash cow for any dealer, not contained under a lot of warranties. There's testing they can do to determined a failed Cat, but why would they bother doing that?
 

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Ditto on skepticism about bad cat. Don't get knee jerked. It seems odd you'd get suddenly get both those codes together. I second the low cost troubleshooting first. Make sure you have a good gas cap & that it's on tight. Fill with premium & run at least 1/2 tank through. Then clear the codes & see what happens; you've got nothing to lose except the opportunity to possibly waste money by replacing a perfectly good Cat.
 

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Discussion Starter · #16 · (Edited)
Thanks for all the feedback. Went to an indie place. They said that one of the three modules was below threshold, but still working, and said I could continue to drive it without any problem. However, they indicated it might not pass the next emissions inspection, in which case i would have to replace the one that is below threshold.

Yes, the other they suggested was just the gas cap. I have had that gas cap warning come on from time to time, so I'm a bit confused why that wasn't on as well..

thanks for all the replies!
 

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sounds like you have your answer.

My 2006 at about the same mileage used to throw the PO420 code everytime there was a significant temperature change from warm to cold. I never did anything to it except clear the codes. Drove it 100k miles that way. Every fall/winter, the same thing happened. Every spring, summer, no problem.
 
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