what is code 44?

[stlunatics2oo3]

what is code 44?

[GnatGoSplat]

CODE 44

 

Trouble Code 44 indicates that the O2 sensor is showing a persistently high exhaust oxygen content (lean), despite the efforts of the ECM to increase injector on-time (thus increasing fuel delivered). Integrator and BLM numbers may indicate > 128 by a substantial margin.

 

Code 44 is set when:

 

O2 sensor voltage remains below .2 volt for 60 or more seconds

System is operating in "Closed Loop."

No Code 33 or Code 34

Possible causes include:

O2 sensor defective or lead shorted

Lean injectors (dirty or blocked)

Water in fuel

Exhaust leaks upstream of O2 sensor

Fuel pressure too low

Note: Presence of Code(s) 33 and/or 34 may indicate MAP problem. This should be the first suspect in the case of a Code 44 being set.