I have a hondata p28 in my car. Before, i had toda b cams and it was tuned for that. Now i have skunk2 stage 1's and i'm still running off the same map. Randomly, i will get a check engine light while driving. But when i turn off my car to check the code, the engine light is gone. What gives?

 

mine does the same, but its a chipped p 91.is it usually hot when it does that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mmuller &raquo;</TD></TR><TR><TD CLASS="quote">mine does the same, but its a chipped p 91.is it usually hot when it does that?</TD></TR></TABLE>

Naw, its not really hot. Like randomly after cruising on the freeway or something. I don't get why it does it? Its not so much the fact that the light is going on, but i'm not sure if something actually bad is going on with my motor.

 

anyone know?

 

bump

 

Does it throw the light at highway speeds? I have that same thing happen. When I drive along on the highway for about 10 min. my light comes on. But when I shut it off and restart it goes off.

 

Yeah it does that at high way speeds. Or if i'm cruising for a few minutes on a local road. I'm thinking its my primary o2 sensor. Cause when i check for the code, it just flashes once.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StinkyTofu &raquo;</TD></TR><TR><TD CLASS="quote">I ... But when i turn off my car to check the code, the engine light is gone. What gives? </TD></TR></TABLE>

you do not need to turn off the car and turn it back on to check your code.
while the engine is idleing, you can jump the wire and just run the code
code 1-0 is your o2 sensor.

 

Sounds like o2 sensor to me.

 

o2 sensors are over rated anyhow! LOL

 

its the POS chip. My old chip would the exactly the same thing, at least 3 times a day, bought a new chip, never happened again, to this day it has yet to throw a CEL.

Try replacing the chip.

 

When you say chip, do you mean the hondata chip? Or the whole p28 ecu?

 

the hondata chip.

When i got a new chip put in, the check engine stopped coming on, im hoping it will be the same for you

 

Funny...i was driving on the freeway today...and I got a CEL.

So I pull over and jump the connector...but it flash REALLY quick...not a normal short flash. It was weird.

I just reset my ECU and no code.
I hope it's not the Hondata.

-Rod

 

actually...even took a vid....

*RIGHT CLICK SAVE TARGET AS*
http://www.bol.ucla.edu/~rodk/CEL.AVI

what do u guys think? it actually seems slower in the video though. But that can't be a code 1. I've had my o2 sensor wiring throw a code 1 before and it wasn't like this.

Rod