Nowhere Man

I looked that up and that is left O2 sensor lean condition. what can cause that to act up. the other week I had a code 45 which was left O2 being rich. I found that the pig tail coming from the engine harness was messed up. So I replaced the whole pig tail carefully today.

am I looking at a bad O2 sensor? the other month I had to replace a fuel pressure regulator. would that have anything to do with this.

antfarmer2

44 is lean exhaust detected did the pig tail fix it?

Nowhere Man

I know that. But what would cause this. And before I repaired the pig tail I had a code 45.

antfarmer2

Code 44- Lean exhaust indicated. Check for possible lean fuel possibilities, such as low pressure caused by faulty regulator, fuel pump or fuel lines kinked or partially collapse, vacuum leaks, clogged air filter or fuel filter.. Check wiring and connections to O2 sensor. Check ground terminals to ecm. Replace O2 sensor

antfarmer2

Code 45- Rich exhaust indicated. Check possibilities for a rich condition, such as faulty EVAP system canister for fuel contamination, fuel in oil, leaky injectors, faulty fuel regulator or one or more leaky fuel injectors. Also check EGR system for sticky valve or faulty control circuit. Replace O2 sensor.

Nowhere Man

It only throws the code after the engine warms up.

antfarmer2

Then my thought would be change your o2s

antfarmer2

Is it boging and backfiring under the hood when you jump on it?

Nowhere Man

Nope runs fine doing warm up.

antfarmer2

What do you mean doing warm up

Nowhere Man

Until it goes to open loop. Or until the light come on

antfarmer2

Ok what does it do then I never jump on mine cold

Nowhere Man

It runs fine like nothing wrong

antfarmer2

My 94 ran bad with no codes changed the o2s never ran better I did my knock sensors at the same time to give it a proper flushing :cheers

How many miles and are they original o2s:

Nowhere Man

I replaced the O2 sensors about 30k miles ago.

antfarmer2

If they were good ones should be fine look at all the other things posted and let us know

Nowhere Man

I will never rule out replacment parts I know they don't have a great track record

1stVetteFinally

check your fuel pressure. I had to replace a fuel pressure regulator twice. My car (92 LT1) was throwing 44 and 55 codes. Found I only had 35 PSI on the fuel rail. Replaced fuel pump, filter, and regulator. Ended up with even less PSI on the rail (28 PSI this time). Replaced the regulator again, and things seem to be working properly now.