1985 - code 44
Thread Starter
Instructor
Joined: Mar 2006
Posts: 111
Likes: 0
From: San Antonio Texas
1985 - code 44
Damn
I just solved an oil leak problem and when taking the test drive the check engine light came on. I just pulled the codes and got code 44. I check the connection to the o2 sensor. Any suggestions on where to start trouble shooting? Not sure if relevant, but I had an oil leak from the oil pressure switch that covered the back of the motor with oil. I cleaned everything up. I didn't really find anything useful on the search tool.
As always thanks in advance.
I just solved an oil leak problem and when taking the test drive the check engine light came on. I just pulled the codes and got code 44. I check the connection to the o2 sensor. Any suggestions on where to start trouble shooting? Not sure if relevant, but I had an oil leak from the oil pressure switch that covered the back of the motor with oil. I cleaned everything up. I didn't really find anything useful on the search tool.As always thanks in advance.
Burning Brakes
Joined: Jun 2006
Posts: 1,096
Likes: 28
From: Baltimore MD
Hope this helps...
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.
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
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.
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
Thread Starter
Instructor
Joined: Mar 2006
Posts: 111
Likes: 0
From: San Antonio Texas
Hope this helps...
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.
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
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.
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 your response.
Within the past year I replaced the injectors, the o2 sensor, fuel pump, MAF and vacuum lines. This is the first time I had the check engine light come on since I have owned the car (2 years). I will try to track it down and keep you posted.
Do you know how to check an incorrect PROM? Oh yeah, what is a PROM again?
Team Owner
Joined: Jan 2003
Posts: 20,293
Likes: 240
From: Summerland B.C. Canada
Not likely a problem if everything is stock.
This info is from my 86, but still may shed some light.
http://members.shaw.ca/corvette86/Code%2044.pdf
