The DTC Disable thread (P1235, P1241, P1238, etc)
The way I understood things was that P1235 indicates a boost spike, right? It detects more air coming in at a certain RPM and TPS than expected, and initiates limp mode to prevent that from causing damage. I've been having issues with this for a while now where I was hitting over 25.5psi at 3.5k rpm, so a fix seems like a blessing... but...
Isn't it still a good safety net? And can't the conditions under which P1235 is issued be tuned for higher boost/bigger turbos by tuning the Airflow Check tables?
Am I understanding P1235 correctly? Under what circumstances would you NOT want to disable this code? Sorry for being the noob
Isn't it still a good safety net? And can't the conditions under which P1235 is issued be tuned for higher boost/bigger turbos by tuning the Airflow Check tables?
Am I understanding P1235 correctly? Under what circumstances would you NOT want to disable this code? Sorry for being the noob
it's airflow and if it is within or outside of it's parameters, so yes a boost spike could trigger it, as well as many other things. You will start hitting it in the higher RPM once you get a turbo that flows some real air.
Thread Starter
Joined: Feb 2007
Posts: 9,486
Likes: 67
From: Melbourne, Australia
You copy/paste what XML into your ROMID.xml file in ecuflash (pick the right xml from post #1)
Then just do whatever the names says, ie 0x26 -> 0xFFFF means change 0x26 to 0xFFFF...
Then just do whatever the names says, ie 0x26 -> 0xFFFF means change 0x26 to 0xFFFF...
Just got back from trying this one out, no longer throwing the P1235 but instead it threw P0123, P0222, P1233, and P1234 and put me in hard limp mode the second I hit above 5k RPM.
On the bright side, I was able to past 15psi and get to 26.3psi without going into soft limp mode so this mod is a step in the right direction for me.
On the bright side, I was able to past 15psi and get to 26.3psi without going into soft limp mode so this mod is a step in the right direction for me.
Thread Starter
Joined: Feb 2007
Posts: 9,486
Likes: 67
From: Melbourne, Australia
I can fix 1233 and 1234 easy enough
Let me look up the other codes as well
P0123 = Throttle position sensor (main) circuit high input
P0222 = Throttle position sensor (sub) circuit low input
I don't think you should be throwing those codes... Perhaps P1233 and P1234 cause you to also hit P0123 and P0222
I will get some fixes out for P1234 and P1233 asap
Let me look up the other codes as well
P0123 = Throttle position sensor (main) circuit high input
P0222 = Throttle position sensor (sub) circuit low input
I don't think you should be throwing those codes... Perhaps P1233 and P1234 cause you to also hit P0123 and P0222
I will get some fixes out for P1234 and P1233 asap
I can fix 1233 and 1234 easy enough
Let me look up the other codes as well
P0123 = Throttle position sensor (main) circuit high input
P0222 = Throttle position sensor (sub) circuit low input
I don't think you should be throwing those codes... Perhaps P1233 and P1234 cause you to also hit P0123 and P0222
I will get some fixes out for P1234 and P1233 asap
Let me look up the other codes as well
P0123 = Throttle position sensor (main) circuit high input
P0222 = Throttle position sensor (sub) circuit low input
I don't think you should be throwing those codes... Perhaps P1233 and P1234 cause you to also hit P0123 and P0222
I will get some fixes out for P1234 and P1233 asap
P1234 = Fuel/Air Metering
P0223 = TPS/Pedal PS High Input
I removed the torque/ariflow mods and left the throttle mapping in and the codes never came back.
Later one I disabled P1235 using your original code since the P1235 got triggered. So far no P1235
This is for 53040007
Code:
<table name="DTC P1233 Disable 0x0028 -> 0xFFFF" category="Misc" address="549b8" type="1D" scaling="Hex16"/> <table name="DTC P1234 Disable 0x0028 -> 0xFFFF" category="Misc" address="549ba" type="1D" scaling="Hex16"/>
