Check Engine Light.....Truck surges

[jlwilsonjr]

Ok this morning my check engine light came on. The truck seems to "surge" in the lower RPM range no hesitation at all when you nail it. I know this is a very vague question but has anyone experienced this before? The only mod that has been done is a Airraid air filter.

Also the code is P0121 which translates to P0121-TP SENSOR VOLTAGE DOES NOT AGREE WITH MAP - SRT10

What the heck does that mean?

 

[LitemUp]

Does your idle hang above normal? If so you might have a bad O2 sensor.

Try disconnecting the battery for about an hour (negative) terminal post and reconnect. This should clear the trouble if it is that.

 

[spdrcrj]

You have a bad throttle position sensor. Your experience is the exact same as mine. $31 at your local dodge dealer. Seems to be a common problem more and more lately.

 

[jlwilsonjr]

It does hang above normal little above 1k.

I hope a 31$ part is all it is that would great.

 

[spdrcrj]

Yeah...and when you tap the throttle the idle drops to normal?

 

[SANCHOBA]

yup! its the TPS, mine was replaced under warranty