'01 Sentra codes 4 mass airflow sensor & purge vol. control causes or symptoms?
'01 Sentra codes 4 mass airflow sensor & purge vol. control causes or symptoms?
My car (50k miles) ran great until I ran out of gas. After filling up, it barely crawled, it idles irregularly and dies when I try to rev the rpms or drive it. The garage came up with codes for the mass airflow sensor and the evap control/purge volume control. They replaced these two parts and it did not correct the way the engine is running. After checking out the fuel pump as well, they recommended the dealership, they diagnosed it and came up with the same codes and wanted to charge 4 times the amount as the other garage. I've shelled out $200+ so far and nada. Are these codes the cause or symptoms of a completely different problem?
Welcome to NICO.
probably a symptom. Look for a vaccum leak first. Also the car may have addpted to a lower fuel supply when you were running out of gas. Although it should have relearned by now. There is a proceedure you can do to clear all learned values just to be sure thats not it.get in the car and leave the door open so you can hear the door chime when the key is in the ignition. start: put the key in and turn the key to on[do not start the car] wait for the airbag light to go out then turn the key to the off position and count the door chime to 10 then start over do this 3 times without starting the car. This should clear all selflearned values. let me know what happens.
probably a symptom. Look for a vaccum leak first. Also the car may have addpted to a lower fuel supply when you were running out of gas. Although it should have relearned by now. There is a proceedure you can do to clear all learned values just to be sure thats not it.get in the car and leave the door open so you can hear the door chime when the key is in the ignition. start: put the key in and turn the key to on[do not start the car] wait for the airbag light to go out then turn the key to the off position and count the door chime to 10 then start over do this 3 times without starting the car. This should clear all selflearned values. let me know what happens.
Re: (NISTECH) I tried the reset procedure & here's my VIN #
Hello, so I tried the reset procedure a couple of times and didn't get any different results. The guys that first checked it out said they did check for pressure leaks and checked out the fuel pump as well. I found a couple of recall notices which had similar symptoms and they include my VIN#, but I don't know if they were ever serviced by the original owner. Could you check out the history for me please, VIN # 3N1CB51D41L492674. I'm gonna post this in the VIN thread also just for sure, Thanks again -Z
I ran your vin and there are no outstanding recalls. I also went through your history and found all the recalls had been done end of 03. This problem could be ECM failure, have seen a few ecm's failure but there are common codes related to it and your codes are not the same codes. Non the less I am thinking its the ECM.
Edit I see you posted it. If it is the ecm its covered by fedral emission law 8/80. You really need to have a dealer do some real diagnostics on your car and tell them you already had the airflow meter replaced and it didnt fix it. Let them know you feel its an ecm failure.And that you know ecm failure is not all that uncommon on those.
Edit I see you posted it. If it is the ecm its covered by fedral emission law 8/80. You really need to have a dealer do some real diagnostics on your car and tell them you already had the airflow meter replaced and it didnt fix it. Let them know you feel its an ecm failure.And that you know ecm failure is not all that uncommon on those.
Re: (NISTECH) diagnosis
One of the recalls I found was for an ECM, are you saying it was fixed? As far as real diagnostics, the dealership said they ran a diagnostic on it with the same results as the other garage and I told them those things were fixed. Is there something other I should ask them to do? - Z
yea they need to look at the readings from the airflow meter with consult while simaltaniously looking at the sensor input wire AT THE ECM connector with a volt meter and see if the consult is showing the same readings. The consult is a direct tap into the ecm's processor, it shows on the consult exactly what the computer thinks its seeing. If the numbers are different the ECM is junk