Code 45

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Shades - 02 Nov 2005 02:52 GMT

'87 Chevy G20 Van...1000RPM when cold, 15-1700RPM when warmed up, starts
great, good vacuum, great power...

Got a code 45 which is a rich condition(at the O2 sensor). What specific
areas does everyone think(or know) I should look at before changing the O2
sensor(if needed).

...Injectors, MAP sensor, IAC solenoid, TPS, FPR, fuel filter, Fuel pump,
cap and rotor...all good. New EGR valve, EGR solenoid, and timing set.
Plugs look great and wires all have good Ohms. I should probably change the
plugs and wires before the snow falls though huh?

What's everyone's ideas, opinions, and experiences about this?

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Big Al - 02 Nov 2005 03:22 GMT

> '87 Chevy G20 Van...1000RPM when cold, 15-1700RPM when warmed up, starts
> great, good vacuum, great power...
[quoted text clipped - 11 lines]
>
> What's everyone's ideas, opinions, and experiences about this?

When my O2 sensor failed the engine went full rich and the O2 sensor was
telling the ECM it was too lean. Can they fail the other way?

I took mine out and hooked it to a meter, then used a propane torch to fire
it up. It cleaned out and worked for a while then failed again.

Al

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