Trouble Code 44

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Mar 27, 2003 | 03:55 PM

DeanZ28

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Joined: Mar 2003

Posts: 6

From: Watervliet, NY

Trouble Code 44

I'm lloking for the most common problem that will cause the service engine soon light to come on and give a trouble code 44.
I just bought the car a couple of months ago, the check engine light had been coming on after driving it the first week. I noticed the volt meter was going up to 18volts at times, so I changed the alternator. Now the voltage is fine, but I'm still getting the service engine soon light. Could the over-voltage fry my oxygen sensor?
I just replaced the plugs, wires, cap, rotor, and had the fuel injection system serviced. ( not to solve problem, just cause they needed to be replaced) Anyway, they did'nt solve the problem, still getting trouble code 44, my book says the car is running lean. I't seems to run fine, but does hesitate a little on deceleration.

So is there a easy solutiuon to a trouble code 44, change o2 sensor?

Help!!!!!!!!

Dean\
1992 z28
305
power all
60,000mi.

Mar 27, 2003 | 10:50 PM

87IROC-Zowner

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Joined: Mar 2003

Posts: 82

From: Sparta, North Carolina

Quote:

Originally posted by 87IROC-Zowner

Quote:

Originally posted by DeanZ28
Any tips or tricks for trouble code 44? Car is running lean. Just replaced alternator for overvolting (18-20 volts at times). Could I have fried my o2 sensor? Just replaced plugs, wires, cap,rotor, problem still there. "Service engine soon" code 44.
Help

1992 Z28 305

There is no voltage sent to your O2 sensors. The O2 sensors produce their own voltage [0.1 v (lean) - 0.9 v (rich)] depending on how much oxygen is unburnt in your exhaust. Newer O2 sensors are contradictory to this because they have a heater circuit. Most of which have 3 or 4 wires in the plug. They are designed to heat theirselves up quicker so the engine can run in closed loop sooner.

Other things to check is your fuel filter. Low fuel pressure can cause a lean condition. Make sure your O2 wire has not touched the exhaust manifold. Check for vacuum leaks especially around the throttle body and intake. One last BIG thing to check is any exhaust leaks before (in front of) the O2 sensor. A leaking exhaust manifold gasket can "suck" air and cause the O2 to sense a lean condition. Other than all that.. replace your O2.

Mar 28, 2003 | 07:25 AM

DeanZ28

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Joined: Mar 2003

Posts: 6

From: Watervliet, NY

Cool

Thanks for the info. I'll check all that out. Fuel filter is probably overdue, and o2 sensors are relatively inexpensive.

Dean P.
1992 Z28 25th Anniv. Edition
305

http://www.geocities.com/dean_pausley/fullcar.jpg

Last edited by DeanZ28; Mar 28, 2003 at 10:37 AM.

Mar 28, 2003 | 11:14 AM

87IROC-Zowner

Registered User

Joined: Mar 2003

Posts: 82

From: Sparta, North Carolina

Correct me if I'm wrong, but in 1992, was GM still only using one O2 sensor on Camaro's (TPI or TBI)?

Mar 28, 2003 | 12:03 PM

DeanZ28

Thread Starter

Registered User

Joined: Mar 2003

Posts: 6

From: Watervliet, NY

yes

Yes, you're right. 92 has just one sensor. My hanes book just says its in the exhaust pipe, and to watch the pigtail. Code 44 doesn't indicate "drivers side" in this instance.