mal 44

[flyhigh]

fuel pressure 36 46 no vac leaks no exhaust leaks what to look for

 

[whitehot1]

fuel pressure 36 46 no vac leaks no exhaust leaks what to look for

You probably know this already but i'm going to post it in case you don't. It may give you some things to look at for the source of the problem.

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 BLMnumbers may indicate > 128 by a substantial margin.

The conditions for setting this code are:

• no Code 33 or Code 34 (MAF Error) present, and
• the O2 sensor voltage remains below 250 mVolts, and
• the ECM is in Closed Loop control, and
• the above conditions exist for more than 50 seconds.

Typical causes for this code include:

1) O2 sensor defective or lead shorted
2) Lean injectors (dirty or blocked)
3) Water in fuel
4) Exhaust leaks upstream of O2 sensor
5) Fuel pressure or volume too low
6) MAF sensor reading lower airflow than is actually present
7) Vacuum leaks
8) Incorrect or poorly calibrated PROM

 

[gsgnnut]

Everything white hot said I Just went through this. Original chip is junk and prone to this problem. So start there. Then chase vac lines and maf hose for leaks. Also a cracked header will cause this too. Bad maf also possible. What are your scanmaster #s?

 

[flyhigh]

You probably know this already but i'm going to post it in case you don't. It may give you some things to look at for the source of the problem.

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 BLMnumbers may indicate > 128 by a substantial margin.

The conditions for setting this code are:

• no Code 33 or Code 34 (MAF Error) present, and
• the O2 sensor voltage remains below 250 mVolts, and
• the ECM is in Closed Loop control, and
• the above conditions exist for more than 50 seconds.

Typical causes for this code include:

1) O2 sensor defective or lead shorted
2) Lean injectors (dirty or blocked)
3) Water in fuel
4) Exhaust leaks upstream of O2 sensor
5) Fuel pressure or volume too low
6) MAF sensor reading lower airflow than is actually present
7) Vacuum leaks
8) Incorrect or poorly calibrated PROM

thanks for list will replace o2 sensor go from there

 

[flyhigh]

Everything white hot said I Just went through this. Original chip is junk and prone to this problem. So start there. Then chase vac lines and maf hose for leaks. Also a cracked header will cause this too. Bad maf also possible. What are your scanmaster #s?

scan af 06 lb 36 bat 13.6 clt 190 tps 42 iac 36

 

[Pronto]

If your cc counts are slow moving or don't move at all while driving the O2 is failing.

 

[flyhigh]

learning from you guys it was o2 sensor cc was not moving thanks every one

 

[gsgnnut]

I was ready to burn my gn and this site was huge in helping me put down the torch and chase off the gremlins that were making me nuts.

 

[whitehot1]

learning from you guys it was o2 sensor cc was not moving thanks every one

What o2 sensor did you decide on ?

I've learned and have had the best results with the Denso part #2341001.

Rockauto.com has the best prices with fast shipping that i have found for them.