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Old 08-08-2009, 11:05 PM   #1
FMD
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Default CEL - Air temp sensor?

So I got the check engine light after finishing the swap (no surprises there), 8 codes were thrown, installed exhaust, cleared codes, now down to ~3 I think.

I have P0155 (appears twice) which is some kind of 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1). Is there any way to check which O2 sensor is causing the fault? This code is for the O2 sensors on the exhaust manifold right?

The other code being thrown is P1145 which is for something cryptic that I'm not sure about Manufacture controlled fuel and air metering (?) is one possible definition.

One thing I've noticed though, does the M52 use an intake temp sensor like the one that plugs into the M44 airbox (pre MAF)? I didn't see a connector for it I think, well there might be one if it's the connector that I plugged into the fuel tank vent thing (the little rubber thing with a connector on it that the blue fuel tank vent line is running to). So I guess I should ask this: does the M52 use an intake temp sensor or need anything connected to the fuel tank vent or could P1145 be completely unrelated to either of these things?
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Old 08-08-2009, 11:22 PM   #2
FMD
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Ok I did some looking and it seems that yes the M52 uses an intake temp sensor and yes the fuel tank vent valve has a connector going to it also.

I guess since I didn't find one of these connectors, could someone take a picture of where their air intake sensor wire is coming from / going to and same for the fuel tank vent valve? I'd greatly appreciate it!

The fuel tank vent valve is this here:
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Old 08-12-2009, 02:41 AM   #3
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P1145 is actually for some 3/2-way valve or whatever by the fuel pressure regulator under the drivers side of the car.

After determining that I had no brake lights I realized what the problem was, I has switched the brake light connector with the 3/2-valve connector. I switched them back to their proper places, cleared the CEL codes with a OBDII scanner and now I just have the O2 sensor to take care of which is on its way.

Almost there!
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