I have a 7th Gen 2011 Max and the “Service Engine Soon” light just came on. I had been noticing a little rough acceleration, so I figured it might be spark plugs, but I grabbed my OBD 2 sensor to check it out. Plugging it into the car results in no connection. I wanted to check the fuse, but I can’t identify which fuse it is - could anyone take a look at the pictures below and let me know when to look?

Any help is greatly appreciated,
Steve

 

 

Which fuse are you talking about? If there is no power to the ECU, the car will not run at all. How old is your OBD-II reader? You could go to an O'Reilly's or AutoZone and they can take a free read for you.

S

 

Don't think these vehicles have a fuse dedicated to the OBD port. Fairly certain that they are driven directly by the ECM. If there werew a fuse to check, it would most likely be the ECM fuse. However, if vehicle runs at all, obviously the ECM is working and fuse isn't blown.

Also - you have to verify that your OBD-II reader is CAN-compatible. It must be able to read CAN protocol (controller area network). All 2008 vehicles and newer are required to be CAN compatible and if your reader doesn't support it, then it will not connect to the ECM.

 

Just making sure here, you did put the car in the "on" position without the engine running?

 

Yes. You can cycle to on without starting the car. Do not put your foot on the brake. You may have to press the button twice as the ignition will cycle from OFF to ACC to ON.

S

 

So, In an interesting turn of events, I pulled a bunch of the fuses out and tested them. Then, without finding any blown fuses, I put the cover back on the internal fuse compartment under the drive side and figured it was a disconnected OBD port.

I have an extended warrenty so I made an appointment to see if it was covered. Then on my way home from work, while driving - i decided to plug my OBD CAN reader INNOVA 3100e into the port because the "Service Engine Soon" light had gone out on the dash.

Lo and behold, it worked and it read P0101 (Mass Air Flow). I deleted the code to see if it would throw again and it hasn't.

Strangest thing of the entire situation - When I bought the car, it annoyed the hell out of me that the Climate Control wouldn't remember your settings when you turned the car off. Ever time I restarted the car, the Climate Control was off and I had to turn it back on. After going through the fuses - the climate control now remembers the last setting...

I guess that's how it goes. Thanks for the suggestions all.
Steve

 

Im having this exact same issue (This week lol) I got 3 codes. P0101, u0101, u0164

 

Ck the tsb there's a tsb for po101 the maf one