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View Full Version : Help!! Showing trouble code P1121, won't start


ggt4
03-04-2007, 04:56 PM
P1121 Throttle Position Sensor Inconsistent with Mass Air Flow Sensor

I was driving at hwy speeds just after going near wot, then my car cut off. All my accessories were still on so I turned onto a side street and coasted to a stop. I plugged up the predator and got code p1121. Does that mean that sensor is bad? When I try to start the car it cranks and sometimes may idle for a split second and then go off. Its getting fuel so its not fuel related. Any Ideas,
KillJoy
03-04-2007, 04:59 PM
<TABLE width="90%" align=center border=1><TBODY><TR><TD width="10%">P1121</TD><TD width="90%">Throttle Position Sensor Inconsistent with Mass Air Flow Sensor</TD></TR></TBODY></TABLE>

Clean and reseat all connections????

KillJoy
HwyCruiser
03-04-2007, 05:02 PM
Check all of your s/c pipe connections. Sounds like you blew something off.
JMan
03-04-2007, 05:06 PM
What Killjoy said. Both sensors - unplug and check before reseating. Also check the intake tube for false air leaks. Hoses off at tube or the attachment away from the tube. That code means the sensor's circuits are in order but they are not jivin'. Typically an air leak.

Good luck,

J
ggt4
03-04-2007, 09:12 PM
I cleaned both sensors at the throttle body and the one at the mass air, but I still have the same thing. I will check some of the hoses tomorrow when its lighter and warmer outside.
Marauderjack
03-05-2007, 05:15 AM
Re-set fuel pump switch.....it may have tripped while at WOT??:confused:
ggt4
03-05-2007, 04:58 PM
Check all of your s/c pipe connections. Sounds like you blew something off.

JD, you are right once again. After jacking the car up one of my connections prior to the intercooler was off. I have replaced some of those cheap clamps with the t bar style clamps.....Thanks again
HwyCruiser
03-05-2007, 05:45 PM
JD, you are right once again. After jacking the car up one of my connections prior to the intercooler was off. I have replaced some of those cheap clamps with the t bar style clamps.....Thanks again

I'm happy to hear it was something minor.

Yeah, those worm gear type hose clamps really need to be gone through and re-checked a few times after install. The silicon connections that I used for the intercooler relocation requried t-bolt clamps, which I liked a lot. I should go though and replace all of the others.