OldBurban

Hello all, I have a 2004 8.1 Suburban that I have recently replaced the bank 1 sensor 1 O2 sensor. The old one some how was bent and had a hole in the side of it (not sure how that happened). After replacing the sensor we turned the check engine light off and then a couple days later it comes back on. It is the same code for the same sensor. We have tested the male side of the plug with a volt meter to check to see if its getting the correct power and it is. I am not sure on what could be causing the check engine light to keep coming back on with the same code. Has anyone else has this issue before? If so what was the solution?
Code: P0135

tech2

lots of different 02 codes, 02 heater, stuck high/low/open circuit,???...what is the code that is setting

OldBurban

Ops sorry kinda forgot a important factor P0135

PNW NBS Z71

Here is a list of possible causes and fixes: Plus, I would always do all 4 sensors at the same time.

What are the Possible Causes of the P0135 Code?

As mentioned, the P0135 code can be an issue with the sensor itself, but it can also be due to other underlying causes.

Here are some of the most usual causes of P0135:

• Bad oxygen sensor
• HO2S ignition circuit is open
• HO2S heater low control circuit is open
• HO2S heater element is compromised
• Damaged HO2S connector (e.g., damage or moisture in pins)
• HO2S heater low control shorted to voltage or ground
• Malfunction of the sensor wiring and/or a circuit issue
• Malfunction of the engine coolant temperature sensor
• Issues with the PCM (e.g., outdated software)
• Low fuel pressure
• Leaks in the intake air system or exhaust system

What are the Common Symptoms of the P0135 Code?

Unlike other error codes, there aren’t too many symptoms that accompany a P0135 code. The most obvious of all would probably be just an illuminated Check Engine indicator—and this usually just appears when you start your vehicle and should go away within a few seconds.

Here are a few other symptoms you may observe with a P0135:

• Check engine light comes on
• Fuel economy becomes less efficient
• Vehicle may run rough or idle
• Engine doesn’t operate as smoothly during start-up
• Exhaust smells bad or emits black smoke

How to Diagnose the P0135 Code

The P0135 code can be triggered by a number of reasons, from an issue with the oxygen sensor’s heater element to an exhaust system leak. Performing an accurate diagnosis can be tricky, especially if you’re not an automotive expert.

Hence, it’s best to leave the job to a professional.

Still want to perform the diagnosis yourself?

How to Fix the P0135 Code

To be honest, there is no one-size-fits-all solution for most OBD-II trouble codes. So if you are not confident with your automotive aptitude, it may be best to leave the task to an expert.

Otherwise, start by diagnosing the issue. Determine what’s triggering the P0135 code, then identify the appropriate fix using these online auto repair resources and guides.

Keep in mind that you will need to research a fix that has worked for someone who has the same vehicle as you. The exact repair for a P0135 may vary depending on the vehicle’s make and model. For instance, what previously worked for someone’s Honda Civic may not work for your Chevrolet Suburban.

Also, make sure to consult your owner’s manual first before attempting to fix the problem. Certain repair steps for a P0135 may vary depending on the vehicle’s make and model.

For more in-depth information on automotive repairs, you can secure an ALLDATA single-vehicle subscription. It will help you resolve not only the P0135 code but also any other future issues that your vehicle may face.

ducati_848

PNW you're just a guy full of knowledge, thanks for all your help

PNW NBS Z71

Thank you, but this info is out there for everyone. I just know where to look for it. Working on it and doing my diagnostic steps is always easier for me than explaining in great detail.

tech2

did you check the 02 heater fuse?

repairman54

I'll add did you use a GM or AC sensor. Bosch and other stuff is very problematic right out of the box new.