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Discussion Starter #1
Hello, Newbee here
The wife bought a 2003 durango with a blown motor.
We have replaced the motor with a remanufactured 4.7, new injectors, throttle body cleaned, all sensors replaced and before I can even drive this thing I get the the dreded P0121 code, TPS. I have bought autozone and dealers one and neither work.
Nothing I have done will get this code to go away, the vehical will not keep idle, I have check the voltage at the T/B and all checks out.
I'm already tired of this thing, not sure what to do. It sound like this is a common issue.
Any info on what to do next would be great.

Thank you for reading.
Adam
 

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Checking my list a P0121 can be either "TPS Voltage Does Not Agree With MAP - TPS signal does not correlate to MAP sensor signal." or "Accelerator Position Sensor (APPS) Signal Voltage Too Low - APPS voltage input below the minimum acceptable voltage."

It may be worth checking the MAP and APPS again, just to make sure.
 

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Discussion Starter #3
the MAP sensor is new, not sure what the Accelerator Position Sensor APP is. will need to look for that.
thx for the reply. TPS? I have tried a total of 3 and all the same readings.
 
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