P0140 code
slingslingbinks
12-08-2019, 08:22 PM
98 lumina, 3800 series 2
P0140 code keep's popping up, Only after a long idle.
If code is cleared and you can drive a full tank of gas out of it with out the CEL coming on.
O2 sen circuit no activity detected. Bank 1 sen 2. This is the post cat O2 sen.
Has a issue with a broken MAF sensor, Tip was broken and bent sensor wires, Swapped out the MAF sen and code comes back.
I monitor the O2 sensor with my Snap-on Scanner and it's got activity,
Other than removing the O2 sensor and wiring up to the connector at the motor, and checking it out, I'm at a loss.
Motor run's fine with the CEL on, Suspect it's just intermittent and another word's not active all the time.
Although the car has a aftermarket Midas Cat on it and i just replaced the LIM gasket's, Plenum and valve stem seal's.
It's also possible the Rear O2 sensor is oil fouled from the bad valve stem seals.
P0140 code keep's popping up, Only after a long idle.
If code is cleared and you can drive a full tank of gas out of it with out the CEL coming on.
O2 sen circuit no activity detected. Bank 1 sen 2. This is the post cat O2 sen.
Has a issue with a broken MAF sensor, Tip was broken and bent sensor wires, Swapped out the MAF sen and code comes back.
I monitor the O2 sensor with my Snap-on Scanner and it's got activity,
Other than removing the O2 sensor and wiring up to the connector at the motor, and checking it out, I'm at a loss.
Motor run's fine with the CEL on, Suspect it's just intermittent and another word's not active all the time.
Although the car has a aftermarket Midas Cat on it and i just replaced the LIM gasket's, Plenum and valve stem seal's.
It's also possible the Rear O2 sensor is oil fouled from the bad valve stem seals.
maxwedge
12-09-2019, 06:43 AM
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