O2 sensor electronics testing

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O2 sensor electronics testing

#10

10-19-2007, 01:12 AM

emerydc8

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Join Date: May 2007

Location: Arizona

Posts: 760

While I am waiting for the rubber boot to arrive for my MAF, I hooked the autometer up to my car to check the Lambda. It was consistently between 48%-52%--both at idle and 2500 RPM. Does anyone know what this plug is with the numbers 052 stamped on it? It's on the right side of the engine bay.

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1994 E420, 200,000+ miles
1995 E420, 201,000 miles

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