SyberTiger
Well-Known Member
- Joined
- May 18, 2007
- Messages
- 767
- Reaction score
- 51
- City, State
- Orlando
- Year, Model & Trim Level
- 2002 Limited 4x4 4.6L
The last couple of weeks I've noticed my engine idle running a bit fast even after the vehicle is running at optimal temperature. It started out that the idle would be 900 - 1200 RPM (vehicle in neutral) on various days. Then on another day it would be back at it's typical 700 - 750 RPM. It didn't throw an engine code for a couple of weeks but then did the other day under no particular circumstances to note other than what I described above. The code is P1120 - Throttle Position Sensor (F48F-9B989? or F4SF-9B989?). Today the RPM really climbed such that at idle with the vehicle warm but sitting in neutral it jumped up to 2000 RPM and pretty much stayed there the rest of the day no matter how many times I would restart the engine during different times of the day.
The high idle RPM reminds me of when my IAC went out. When that happened the RPM was 2200 -2400 RPM but under that circumstance it never threw an engine code.
Has anyone here had the P1120 code and did your engine behave like I described? Is there an easy way to check the throttle position sensor to figure out if that's the culprit? Is the part so cheap ($20) that I should just replace it and hope the problem goes away?
The high idle RPM reminds me of when my IAC went out. When that happened the RPM was 2200 -2400 RPM but under that circumstance it never threw an engine code.
Has anyone here had the P1120 code and did your engine behave like I described? Is there an easy way to check the throttle position sensor to figure out if that's the culprit? Is the part so cheap ($20) that I should just replace it and hope the problem goes away?