How do I extend oxygen O2 sensor warm up time trouble codes P0134 P0154

[04colyZQ8]

What tables can I modify? To increase the time the PCM keeps the heater circuit on, and or increase the switch over time from closed to open loop?

I am getting codes P0134, P0154 wiring fuses are fine replaced the sensors got same codes, get the truck hot then delete codes restart, runs fine no codes set, ounce it is hot it seems fine?? To free flowing exhaust takes longer to warm up maybe? OBX 1 3/4 stainless long tubes high flow cats etc..

2006 SSR tune running, 2007 LR4 V8 4.8L E40 PCM

attached logs after sensor change are these O2 voltages normal??

[LSX378]

You can extend the time taken to go from open to closed loop in the ETC related temperature parameters "Closed Loop Enable" or by the delay time.

[04colyZQ8]

You can extend the time taken to go from open to closed loop in the ETC related temperature parameters "Closed Loop Enable" or by the delay time.

I did exactly that set the temps up to 185 instead of 131, and delay time up to around 200 and 320 seconds. re-flashed and ran it as soon as it reached the old setting 131 it set the O2 codes.. what the heck, I changed the setting?

[GrannySShifting]

Ive seen that on one also, seemed liek it was disregarding

[04colyZQ8]

Ive seen that on one also, seemed liek it was disregarding

Is this normal problems with long tube headers and a free flowing exhaust?

What is the solution? I also get P0174 lean code on bank 2 only?? It's like they cool off to quickly? especially bank two, If I rev the engine around 3000 rpm and get it hot then let it idle the O2 voltages seem within normal range and I don't get a bank 2 lean code, until it start to cool off, then it sets the code.

Also constantly get P0134 and P0154 no activity O2 codes as soon as the temp gets to 131 F

[OldSkool69]

I had this same problem in a 2008 TB EXT 5.3L and a 2003 Yukon XL 5.3L .

The SSR I think use the same TB Ext o2 sensors acdelco 2133839, but the E40 probably use other O2 sensors like # 2133533
sometimes not using the correct sensor or using other brand replacement gives some issues.

Drove me crazy. Checked all wires. All fine, replace O2 sensor twice in each. Same thing.

The problem was a slight rough idle at Park, and less rough at Drive Suvs not moving. Once they move no missfire, no surging, nothing.

Last Thing I did to both was a Cylinder balance test, then a Case Relearn. After that has been a month with no SES light on again.

Idle still kind of rough so I guess is not the right solution (Changed coils, spark plug wires, Spark plugs, Injectors, IAC, and so on. Rough idle still there!)

Hope this helps some. And please post if you got a solution.

[04colyZQ8]

I had this same problem in a 2008 TB EXT 5.3L and a 2003 Yukon XL 5.3L .

The SSR I think use the same TB Ext o2 sensors acdelco 2133839, but the E40 probably use other O2 sensors like # 2133533
sometimes not using the correct sensor or using other brand replacement gives some issues.

Drove me crazy. Checked all wires. All fine, replace O2 sensor twice in each. Same thing.

The problem was a slight rough idle at Park, and less rough at Drive Suvs not moving. Once they move no missfire, no surging, nothing.

Last Thing I did to both was a Cylinder balance test, then a Case Relearn. After that has been a month with no SES light on again.

Idle still kind of rough so I guess is not the right solution (Changed coils, spark plug wires, Spark plugs, Injectors, IAC, and so on. Rough idle still there!)

Hope this helps some. And please post if you got a solution.

Well I am running a SSR and SSR computer similar to the trailblazer.

Apparently this is a normal occurrence with long tube headers and a free flowing exhaust?? So What the solution is is to ground the O2 heater wires from the PCM to chassis ground for the front O2 sensors. So the heater is on as soon as the ignition is, and stays on. Then turn off the heater codes with HP tuners. That and a case learn worked for me.

I still get bank 1 rick, and lean codes, and bank 2 lean, but I think that is possibly to do with the tune being off? No more false knock, and idle is way better