Could someone decipher these CEL code(s)?

[GTU89]

Could someone decipher these CEL code(s)? I am a little rusty on it and I want to be sure of what they are saying, all I need is the numbers they correspond with, I can look it up in my book.


I don't think you need to watch the full video to see all of the flashing codes, I just recorded a bit too long lol.

[3X00-Modified]

Looks like 12 44 and 45

12 just means
DTC - 12 No distributor reference pulse (diagnostic test active)

and 44-45 means bad o2 sensor Odd that it's stating "left bank"

DTC - 44 Left bank O2 sensor error (lean condition indicated)
DTC - 45 Oxygen sensor error (rich condition indicated)

[scd88ga]

Every code is flashed 3 times in two digit sequences. 12 is the start code and the end code, what you want are the codes flashed between the 12's. Also, what Jon said, 44 & 45.

44 Oxygen sensor voltage was under 0.2 volts for 60 seconds of closed loop operation.
45 Oxygen sensor voltage was over 0.7 volts for 30 seconds in a closed loop when throttle angle was between 3% and 45% and engine had been running for at least 1 minute.

The site I pulled those fault code descriptions from expects everyone to be a rocket scientist I guess! lol

Moral of the story is, your O2 is junk! Buy a new one, but NOT a Bosch!

[GTU89]

Every code is flashed 3 times in two digit sequences. 12 is the start code and the end code, what you want are the codes flashed between the 12's. Also, what Jon said, 44 & 45.

44 Oxygen sensor voltage was under 0.2 volts for 60 seconds of closed loop operation.
45 Oxygen sensor voltage was over 0.7 volts for 30 seconds in a closed loop when throttle angle was between 3% and 45% and engine had been running for at least 1 minute.

The site I pulled those fault code descriptions from expects everyone to be a rocket scientist I guess! lol

Moral of the story is, your O2 is junk! Buy a new one, but NOT a Bosch!

Yep, I knew the 12 code, I just was not sure of the actual codes. Thanks! This will be the 5th or 6th O2 sensor I've put in it! (First 4 or 5 were NTK garbage, and the current one is a Bosch. Guess I'll go for Delco.)

[GTU89]

Would Denso be a good enough brand? Only ones carried around me are NTK, Bosch and Denso.

[3X00-Modified]

No o2 sensor should crap out that quick regardless of brand... are you sure you don't have fueling issues causing the sensor to read improperly? That is another possibility.

I do believe the sensor that is in my 96 is a Bosch sensor I used ages ago on one of my engines...

[RobertISaar]

from what i can remember, Denso is the actual manufacturer of the Delco units, so i would go for it.

considered running a heated O2? they seem to last significantly longer than the 1-wire units.

[GTU89]

Figured I'd update. Bought a AC Delco O2 sensor for $16 shipped. So I'll put it in today or tomorrow and see if it stops throwing the code, if not then I guess there is something I need to address on it.