Leaking Trans + PO147 + PO442

[rdy4trvl]

Yesterday was a bad day for the fine 2000 Jimmy (142k miles). It started with the above codes, then I noticed a transmission leak in the front (4" puddle after a 40 minute 50-60mph drive).

P0442 GMC EVAP System Small Leak (0.040") Detected
P0147 GMC HO2S-13 (Bank 1 Sensor 3) Heater Circuit

Amateur hour comment: It wouldn't seem the codes + leak are related but they may be. I did read somewhere that the leak could be as simple as an O ring at the radiator.

Any thoughts?
Thanks

 

[Molson02536]

Yesterday was a bad day for the fine 2000 Jimmy (142k miles). It started with the above codes, then I noticed a transmission leak in the front (4" puddle after a 40 minute 50-60mph drive).

P0442 GMC EVAP System Small Leak (0.040") Detected
P0147 GMC HO2S-13 (Bank 1 Sensor 3) Heater Circuit

Amateur hour comment: It wouldn't seem the codes + leak are related but they may be. I did read somewhere that the leak could be as simple as an O ring at the radiator.

Any thoughts?
Thanks

P0422 could be caused by a bad gas cap thats not holding a good seal anymore and P0147 is the O2 sensor after the Catalytic converter not heating up to temp from a bad wire harness or a bad O2 sensor.

Check and keep us posted.
Molson02536

 

[WeldingGirl78]

Curious did you fix the 442 issue?

If so what was the cure for it?
My 09 Sierra kicking the same code,
every time I reset it.... And no the gas cap didn't work for me
Think I am just gonna replace the sensor and see what happens.....

Thanks in advance as I know this last post is a couple years old now.

 

[Alexgolfer]

I'm glad you got some good advice! I hope that your car gets fixed soon.