codes have appeared
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Safety Car
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From: NC
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codes have appeared
I have just installed my LG pros and all was well till today. CEL came on and dtc showed two codes P0133c and p0153c. Slow response bank 1 sensor 1 and slow response bank 2 sensor 1. Is this the front or the back set of o2s. The main reson I ask is I just changed the front position to new GM rear sensors per LG instruction. Had no codes previously but had only driven maybe 50 miles. I checked the fuse and retighten all my clamps. Any body had this before? Help. Thanks 
Burning Brakes
Joined: Jan 2006
Posts: 1,170
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From: Magnolia Greens NC
"Sensor 1"...is a forward/front 02 sensor. Usually You have your tuner "turn off" the rear 02 sensors (Sensor "2") after a LT headers install to avoid codes P0420 & P0430 that the rear 02's will set due to the increased exhaust flow. . Of course, a "Tune" is necessary after a headers install so the front 02s can continue to do their job correctly... did you have this done? did you re-connect the front 02's correctly?
Melting Slicks
Joined: Feb 2007
Posts: 3,176
Likes: 10
From: New Smyrna Beach Florida
As previously stated the codes you are showing are for the front O2s. I know it is common to get insufficient switching O2s after header install, I got P1153C after my install. Not clear on P0133C but it sounds similar. There has been much discussion on here relative to the relocation of the sensors due to headers and subsequent codes. When you get the car tuned, the tuner can address most of these. I haven't run into the P0133C and P0153C relative to headers. Hopefully someone that has experienced this can clarify. If I were you, I would call LG and get some input from them, I'm sure they have seen these codes and could advise you.
Thread Starter
Safety Car
Joined: Dec 2006
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From: NC
2025 Corvette of the Year Finalist - Unmodified
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"Sensor 1"...is a forward/front 02 sensor. Usually You have your tuner "turn off" the rear 02 sensors (Sensor "2") after a LT headers install to avoid codes P0420 & P0430 that the rear 02's will set due to the increased exhaust flow. . Of course, a "Tune" is necessary after a headers install so the front 02s can continue to do their job correctly... did you have this done? did you re-connect the front 02's correctly?
Thread Starter
Safety Car
Joined: Dec 2006
Posts: 3,930
Likes: 1,896
From: NC
2025 Corvette of the Year Finalist - Unmodified
2024 C7 of the Year Winner - Unmodified
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2019 C6 of Year Finalist (performance mods)
As previously stated the codes you are showing are for the front O2s. I know it is common to get insufficient switching O2s after header install, I got P1153C after my install. Not clear on P0133C but it sounds similar. There has been much discussion on here relative to the relocation of the sensors due to headers and subsequent codes. When you get the car tuned, the tuner can address most of these. I haven't run into the P0133C and P0153C relative to headers. Hopefully someone that has experienced this can clarify. If I were you, I would call LG and get some input from them, I'm sure they have seen these codes and could advise you.
Thread Starter
Safety Car
Joined: Dec 2006
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From: NC
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Any body else have an idea.
Thread Starter
Safety Car
Joined: Dec 2006
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From: NC
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Update I confirmed an exhaust leak at the collector/cat connection. I can not stop it with the supplied clamps so I will but some 2 bolt style clamps and see if I can stop the leak there no other problems found anywhere could this be my problem based on the codes?
Melting Slicks
Joined: Feb 2007
Posts: 3,176
Likes: 10
From: New Smyrna Beach Florida
I would fix your exhaust leak, then clear the codes and see if they come back. There are some other potential causes but I would fix the leak and see if that fixes it before I complicate things.
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Racer
Joined: Sep 2007
Posts: 251
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From: Las Vegas Nv
Check all your contacts to your 02 sensor.Unplug them clean them with electrical spray and replug them.Clear all codes,start car and drive under load.I had the same problem and this cleared it up.
Joel
Joel
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Safety Car
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Right this needs to be fixed regardless. I have new clamps coming. I will be on vacation for a few days and they should be here when I return.
Thread Starter
Safety Car
Joined: Dec 2006
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From: NC
2025 Corvette of the Year Finalist - Unmodified
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