[shreyas99]

Originally Posted by ankitahuja

Hmmm. So this is common when the CEL comes on. Is your speedo working? Anything else that you feel has stopped? Is the car powering well?

The FE reduces since the ECU goes into an open loop and the AFR (Air Fuel ratio) becomes rich. Consumes more fuel but the car runs better too

Yes, Speedo is working fine. engine temperature, power etc is normal. But one thing that is new is the Jerking that has started at low speeds, this i feel is due to the low idling.

[shreyas99]

I thought some of you might want to have a look at this.

[KSM-Vtec]

Man this is good stuff..where did you find it?? Any more detials of this type?

Originally Posted by shreyas99

I thought some of you might want to have a look at this.

[ask77]

Originally Posted by ankitahuja

Very peculiar thing that I've noticed while driving with the malfunction light is that the light would NEVER come on if I didn't allow enough back-pressure to build up while driving. It did make me use the clutch more but saved from the CEL to come on.

With time, I know exactly how much back pressure to be allowed or clutch in before it goes on. Guys, try this out and post your findings. You can accelerate on 2nd or 3rd gear and let then let go your foot off the pedal. See if this causes the light to go on.

This is most probably either due to a leak in intake manifold vacuum or the injectors not closing properly when the accelerator is released . this causes the mixture to become either too rich or too lean and causes the cel to come on, which is basically an indicator whether the fuel is being burned optimally or not as reported by the oxygen sensor

[shreyas99]

Originally Posted by KSM-Vtec

Man this is good stuff..where did you find it?? Any more detials of this type?

Actually found this on the net while searching for O2 self repair possibilities and came across this.

[Sprucegoose]

Hey guys i got a similar problem.
Gave my car for servicing [steering rack was leaking oil]
When i got it back, I noticed a few things.

1> Speedo wasn't working
2> Check Engine Light [Yellow] comes on when i use engine braking.
3> The CEL tends to come on quicker when the ambient temperature is hot.

one more thing: i saw a post [on TeamBHP itself] where someone stated that when your CEL light glows yellow there is an emission problem and if it glows red then there is a serious problem.

[ankitahuja]

Originally Posted by ask77

This is most probably either due to a leak in intake manifold vacuum or the injectors not closing properly when the accelerator is released . this causes the mixture to become either too rich or too lean and causes the cel to come on, which is basically an indicator whether the fuel is being burned optimally or not as reported by the oxygen sensor

Hmmm. So how did it become OK as soon as a new speedo cable was put in?

Originally Posted by Sprucegoose

Hey guys i got a similar problem.
Gave my car for servicing [steering rack was leaking oil]
When i got it back, I noticed a few things.

1> Speedo wasn't working
2> Check Engine Light [Yellow] comes on when i use engine braking.
3> The CEL tends to come on quicker when the ambient temperature is hot.

one more thing: i saw a post [on TeamBHP itself] where someone stated that when your CEL light glows yellow there is an emission problem and if it glows red then there is a serious problem.

Exactly what I faced. It's the VSS (Vehicle Speed Sensor). Fix or get a new speedo cable and re-set the ECU.

And I don't think that the CEL can glow RED. It's only Yellow, and it's usually serious!

[Sprucegoose]

Cool, thanks

Sure thing.

will get the speedo fixed any idea how much the VSS / Speedo cable Costs?

[Sprucegoose]

Sure thing. Will get it done ASAP.

My mech is coming down to check a leaky radiator in some time.

[ankitahuja]

Originally Posted by Sprucegoose

Cool, thanks

Sure thing.

will get the speedo fixed any idea how much the VSS / Speedo cable Costs?

Originally Posted by Sprucegoose

Sure thing. Will get it done ASAP.

My mech is coming down to check a leaky radiator in some time.

Speedo cable costs a few hunderd bucks! It'll resolve the VSS issue.

[ask77]

In my experience with Optra there are no speedo or tacho cables . The sensors pick up the relevant data and the instrument panel is totally electronic with no mechanical cables etc. coming in. Although the instruments are obviously analogue

[ankitahuja]

Originally Posted by ask77

In my experience with Optra there are no speedo or tacho cables . The sensors pick up the relevant data and the instrument panel is totally electronic with no mechanical cables etc. coming in. Although the instruments are obviously analogue

Not the same for OHC. Speedo is not electronic and is cable driven.

[shreyas99]

Originally Posted by vinayvtec

Will be going to Honda his weekend hope they won’t say that O2 sensor has gone bad.

Hi Vinay, would you care to share with us the problem diagnosis done by Honda ?

[abk]

Originally Posted by Sprucegoose

My mech is coming down to check a leaky radiator in some time.

Originally Posted by Sprucegoose

Hey guys i got a similar problem.
Gave my car for servicing [steering rack was leaking oil]

2> Check Engine Light [Yellow] comes on when i use engine braking.
3> The CEL tends to come on quicker when the ambient temperature is hot.

one more thing: i saw a post [on TeamBHP itself] where someone stated that when your CEL light glows yellow there is an emission problem and if it glows red then there is a serious problem.

Dear Sprucegoose,

You seem to have been invaded by the same set of problems that I've experienced with my OHC type 2. For your clarification:

1. In OHC 1.5Exi type 2 Engine Malfunction light (Red) and Emission Malfunction light (Yellow) are two separate bulbs. It is unlike an LED changing colours.
2. Emission Malfunction light (yellow) NORMALLY does not indicate a serious fault. The culprit is USUALLY the Oxygen (O2) sensors. I have witnessed a surge in FE driving with the yellow light on & this has been corroborated by another member on this thread.
3. Engine Malfunction light (Red) is SERIOUS. Honda recommends immediate turning off the engine (or it may turn itself off automatically) and not drive any further unless a specialist has investigated into the cause of the Red light. I have experienced this once and the car immediately lost power rapidly and engine shut itself off. It started again only for a minute when i turned the ignition. On subsequent attempts, the engine would not turn on again. I can't seem to remember the diagnosis of the problem. But it was something trivial.
4. I drove my car for good 4 years with the power steering leaking until it was replaced. I used to always carry a can or two of Power Steering oil for topping up. It needed more frequent top-ups whilst driving on the winding hilly roads (more usage of the steering). However, in the last year the leakage gradually became intense.
5. What is CEL?

[di1in]

I had a similar problem in my OHC and i got it rectified just a few days ago. All that it needed was an ECU reset - there was a remarkable difference in performance as well.
But a problem that i face now is that my speedo vibrates heavily unless the engine is idling. Help ?