Code: 45
96-98 Civic
97-98 CRV
96-98 Prelude
94+ Integra

System Too Lean or Too Rich malfunction in the fuel monitoring systems

Anyone know what sensor this could be?

 

primary O2 sensor. Or it's working and the car is really running too rich or too lean. In that case could be: fuel pressure regulator, fuel filter, fuel injectors, MAP sensor or vacuum leak.

 

Honda mechanic said it's a sensor and the part alone costs $400.


Modified by Witty at 10:03 PM 5/27/2003


Modified by Witty at 10:18 PM 5/27/2003

 

it's the primary O2 sensor then, that's the one before your cat, on the header side. $400 is way too much! more like $70 for a new one. Unless you have one of those ultra lean buring civics (not sure what year that was) then it's more like $200.

 

How easy is it to change this sensor?

 

expensive from honda i can tell u that. check your wiring first and see if its a shirt in the system. O2 sensors are expensive

 

Car has major hesitation and is running rich. Car also has some type of hissing sound but nobody can find the noise. Could this mean it is not the sensor? Mechanic said he thought there was a vacuum leak but couldn't find it.


Modified by Witty at 10:18 PM 5/27/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Witty &raquo;</TD></TR><TR><TD CLASS="quote">Car has major hesitation and is running rich. Car also has some type of hissing sound but nobody can find the noise. Could this mean it is not the sensor? Mechanic said he thought there was a vacuum leak but couldn't find it.
</TD></TR></TABLE>
If the car has less than 150,000 miles on it, take it to a dealer to get it checked out and repared for free. (Under the emmision extension warranty.)

 

Where can I find info on that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Witty &raquo;</TD></TR><TR><TD CLASS="quote">Where can I find info on that?</TD></TR></TABLE>
Just go to a dealer with the CEL on.

 

I did, they tried to charge me $600.