lack of boost and o2 sensors

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07-20-2006, 04:32 AM

thisisCP

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lack of boost and o2 sensors

Could a faulty 02 sensor cause a lack of boost? My car's just doesnt seem to make much boost lately and was just wondering if this could be the culprit or if there was some other reason.

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07-20-2006, 05:08 AM

BlackS4tt (Josh)

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no, a bad O2 sensor will not alter your boost. Pressure test your car, you will more than likely

find your problem there.

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07-20-2006, 05:46 AM

thisisCP

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I VAG'd it and got these results.

So this could be a boost leak and vagging it just happened to catch an O2 sensor on its way out.

from what I can gather from the archives, system too rich and engine torque are signs of a boost leak, or perhaps a MAF being funky. Can this cause the car to go into limp mode when I accelerate fast, its happend a couple times already?

What would symptoms of a bad O2 sensor be?

VAG:

4 Faults Found:
17535 - Fuel Trim; Bank 1 (Mult): System too Rich
P1127 - 35-00 - -
17537 - Fuel Trim; Bank 2 (Mult): System too Rich
P1129 - 35-00 - -
17743 - Engine Torque Monitor 2: Control Limit Exceeded
P1335 - 35-10 - - - Intermittent
17521 - Oxygen (Lambda) Sensor; B1 S1: Internal Resistance too High
P1113 - 35-10 - - - Intermittent
Readiness: 0010 0001

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