Need help with CEL fault codes please P1135, P0152, P0154.
Hello to everyone. Requesting help from the experts here.
I had a CEL for about a month now and I thought it was attributed to my fuel pump failure (cracked and leaking fuel) so I just told the dealer to look the fault codes once they get done replacing my left fuel pump and all 4 roll over valves. (I will create a separate post on that later to share knowledge and info with everyone. (note: I am familiar with the gas cap tightness issue so I always ensure my gas cap is really tight)
Dealer said they cleared the CEL fault codes but it came back after the test drive so they asked me if I want them to fix it or leave it alone for now so I can enjoy driving my car before summer ends. So I took my car back from them after they replaced the left fuel pump and 4 roll over valves (right fuel pump replaced 5 months ago.)
My car is a 2003 360 Spider purchased 6 months ago with 10K miles. I now have 17,500 miles as I love to drive.
At any rate, here are the fault codes and dealer notes:
"Scanned vehicle and found the following fault codes. P1135, P0152 & P0154 for oxygen sensor / air flow sensor errors. None related to fuel system".
I checked the posted 360 ECU fault codes here but somehow I cant find P1135. 152 and 154 are indeed oxygen sensor errors.
I talked to the dealer chief mechanic Mark and he is thinking its possible air flow meters are either dirty or going bad as my car is over 10 years old. He said try and swap the MAFS and see if the fault follows. I will try this soon, for now I will enjoy driving my car while weather is nice. Engine runs perfect.
Just asking here if anyone has any experience with these fault codes or can share some troubleshooting techniques or possible source of the fault codes being thrown.
Thanks very much in advance.