1992 LeSabre Trouble Code 13 & 44

[kok328]

I captured trouble codes 13 (O2 Sensor) & 44 (Lean Exhaust).

Q: Is code 44 due to code 13?

Q: Is code 13 being caused by something else that's not logging a code?

[spinne1]

Originally Posted by kok328

I captured trouble codes 13 (O2 Sensor) & 44 (Lean Exhaust).

Q: Is code 44 due to code 13?

Q: Is code 13 being caused by something else that's not logging a code?

Well, changing out the O2 sensor is a good idea at this point and will likely answer both questions. After changing it out, unhook the ECM fuse (or disconnect the battery) for 30 seconds and then drive the car for a while. Then check the codes again.

[wrightz28]

Originally Posted by kok328

Q: Is code 44 due to code 13?

Chnaces are good. When the o2 sensor gets clogged up with carbon it can't read the exhaust contnet, so it just shows up as lean.

[kok328]

I was kinda hoping for something more definitive in order to avoid replacing parts without knowing if it will correct the problem.

[HotZ28]

A bad 02 sensor, or vacuum leak, may be at fault here. If the O2 sensor circuit shorts out, or goes out of range, it may set a fault code. Since you do have a code, the sensor is basically, non-functional. In addition, if you monitor a good 02 sensor on a scanner, you could observe a rapid flip-flop between rich/lean.(5 to 7 times per second)
If it does not flip-flop back & forth quickly enough, this would indicate a

“lazy”

or, dead 02 sensor. If the sensor could maintain the air/fuel mixture around 14.7 to 1 (Ideal A/F), the output should read around 0.45 volts.

[kok328]

I never had good luck removing something that's been rusted in place for 14 yrs.

How do you get the O2 sensor removed without tearing a hole in the exhaust pipe and/or breaking it off in the exhaust?

[stuzman]

Originally Posted by kok328

I never had good luck removing something that's been rusted in place for 14 yrs.

How do you get the O2 sensor removed without tearing a hole in the exhaust pipe and/or breaking it off in the exhaust?

Take the sensor out when the engine has reached operating temp. This is what's normally recommended...