2002 3.8 monte SS I have a few codes but dont know how to go about fixing them!
P0134 O2 circuit no activity detected bank 1 sensor 1
P0135 O2 heater circuit bank 1 sensor 1
P0140 O2 circuit no activity detected bank 1 sensor 2..
Ok bank 1 is the side of the motor with cyls 1 3 5 right? Does no activity mean the sensor isnt working? Im oldschool new to all this modern technology! Thank you for any suggestions.
Chad

 

Causes

The causes for a P0140 code are fairly few. They could be any of the following:

• [*]

Causes

A code P0135 may mean that one or more of the following has happened:

• O2 Heater element resistance is high
• Internal short or open in the heater element
• O2 heater circuit wiring high resistance
• open or short to ground in the wiring harness

Causes

A code P0134 may mean that one or more of the following has happened:

• Bad O2 (oxygen) sensor
• Bad heater circuit in the O2 sensor
• Wiring or connector to the sensor frayed / broken
• Blown heater circuit fuse
• Holes in the exhaust system
• PCM failure

i hope this helps...

 

Ok well the heater circuit fuse was blown, replaced that an ordered O2 sensor. Thank you for the info!

 

FYI - It's recommended you stick with a Delphi or AC Delco O2 sensor. Some issues have been noted in the 3800 community with BOSCH and other O2's.