Code 44

[Alfonso Gomez]

:confused Today I was driving about 40 mph when my SES light lit up. I thought: not again code 34 (MAF burn-off relay circuit failure). After about 4 minutes of driving the SES light went off. When I got home, I read the code at the ALDL and read code 44 (Lean Exhaust Present).

This is the first time I get this code in the four years I have had the car. Fuel pump and filter are new, spark plugs are 9 months old and so are the wires. The car (87 Coupe, automatic, 3:07 gears) has a KN filter with cut lid, TB was removed & cleaned about 6 months ago, IAC and TPS adjusted, Hypertech Thermomaster chip and no cats. I am using 87 octane gas and there is no knocking or pinging during load.

Is it the oxigen sensor needs replacing? As far as I know it has never been changed. The car has 130K miles in it.

Any suggestions?

Thank you.

 

[Edmond]

Alfonso,

I was going to say the O2 sensor as well. If the sensor does have 130K on it; it would be worth it to change the sensor. I went with Bosch a few years ago for about $30. There is an instant improvement in throttle response and your mileage will improve as well.

 

[Dougs91]

Gotta 2nd that!! changed the 02 sensor on my 91 with 127,000 and the difference is really something,smoother idle, and better throttle response.Very easy do-it-yourself project.

 

[grapeknutz]

I think Hib wrote a article on Denso O2 sensors which I think might be better than Bosch set, so thats what I would go for.

 

[Alfonso Gomez]

Thanks, guys. Will try that as soon as I fix my alternator, that just died on me. Just came back from Western Auto and had my battery charged. Will take out the alternator to have it checked and replaced (lifetime warranty).