CODE 40 AND CODE 45

1997 BMW 740

Tiny

nancine1

September, 3, 2008 AT 2:33 PM

1997 BMW 740 V8 134500 miles

I recently replaced the catalytic converters and front 02 sensors which caused check engine light to go out. After a few hundred miles, light came back on with the 40 and 45 codes.

What do you think the problem is?

update 9/7/08

The extraction method to get the codes was the round device that is attached under the hood and has a hand held scanner/reader that displays service codes. I don't know the name of the device.

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1 Answer

Tiny

Dr. Hagerty

September, 3, 2008 AT 10:14 PM

For me to answer this I need to know what extraction method was used to get these codes.

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