P0158 O2 Bank 2 troubleshooting

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91C02920
Posts: 122
Joined: Mon Nov 02, 2015 7:19 pm

P0158 O2 Bank 2 troubleshooting

Post by 91C02920 » Thu Nov 23, 2017 5:35 pm

Hey guys, the check engine light is on and I have code P0158 set. I changed the drivers side O2 after the cat and it is still there. Doesn't seem to be any leaks in the pipe, and the front O2 seems to report as it should. With the key on, engine on or off, O2 bank 2 reports 1.3v.

Would that be a ground in the harness somewhere? Is so, any place to check first?

If anyone has the wiring diagrams for it, that would be a great help.

Thanks all!

s/c'd cav
Posts: 536
Joined: Mon May 30, 2016 8:12 am
Location: PHOENIX AZ

Re: P0158 O2 Bank 2 troubleshooting

Post by s/c'd cav » Thu Nov 23, 2017 8:42 pm

bank 1 sensor 1 , is the driver side before cat o2

bank 1 sensor 2 is after cat

bank 2 sensor 1 is the passenger side before ct o2

bank 2 sensor 2 is after cat

P0158 should be bank 2 sensor 2 , so pass side after cat o2 - https://www.obd-codes.com/p0158" onclick="window.open(this.href);return false;

the 1.3v reading is higher than their operating range

91C02920
Posts: 122
Joined: Mon Nov 02, 2015 7:19 pm

Re: P0158 O2 Bank 2 troubleshooting

Post by 91C02920 » Fri Nov 24, 2017 4:36 pm

Thanks, seems I was looking at a G8 V6 diagram. :roll: The V6 has bank 2 on the drivers side for some reason. I'll swap them out tomorrow and hope that fixes it.

s/c'd cav wrote:bank 1 sensor 1 , is the driver side before cat o2

bank 1 sensor 2 is after cat

bank 2 sensor 1 is the passenger side before ct o2

bank 2 sensor 2 is after cat

P0158 should be bank 2 sensor 2 , so pass side after cat o2 - https://www.obd-codes.com/p0158" onclick="window.open(this.href);return false;

the 1.3v reading is higher than their operating range

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