THIS MORNING WHEN I STARTED MY 98 DEVILLE, THE IDLE WAS SUPER HIGH...LIKE IN THE 2000-2350 RANGE! WHEN I CHECKED THE CODE IT READ P0122. IF I REPLACE THE TPS SENSOR WILL THIS CORRECT THE PROBLEM OR IS THERE SOMETHING ELSE TO IT?

P0122 throttle/pedal position sensor/switch A circuit low input
P0223 throttle/pedal position sensor/switch B circuit high input
P2101 throttle actuator ctrl motor circuit rang/perf
P2104 throttle actuator ctrl sys-forced idle
P2110 throttle actuator ctrl sys-forced limited rpm

Here is the meaning of the codes hope this helps

Check the wiring to the throttle body, check the supply voltages as well. Check fuses too, it sounds like it received a voltage spike and then lost voltage and is now forcing limited rpm.

Code 122 is for a low signal from the TPS, and code 405 is for a low signal from the EGR position sensor. The computer sends a 9 volt signal to most of the sensors and the return signal tells the computer what is happening.
For example, if most of the 9 volt signal comes back from the TPS the computer knows the throttle is closed.
I would check the two circuits to see if the reference voltage is there. If it is not, it could be a problem in the harness, or inside the computer.

P0507, Idle Control System RPM Higher Than Expected
P0122,Generic TPS/Throttle position sensor A circuit low input
P0106, Manifold Absolute Pressure barometric Pressure Circuit Range/Performance problem
P0108, Manifold Absolute Pressure ( MAP) Sensor circuit high voltage.

Good luck

Code P0122 is a TPS (Throttle Position Sensor) sensor out of range.

The operating range of the TPS is about .5 to 4.8 volts. .5 at idle 2.5 at half throttle and 4.8 at full throttle.

This can be checked easily with a scanner. But can be checked with a multi-meter.
P0122 Tjrottle Position Sensor low voltage

You can try replacing it for a start and see what happens (location image)...



Hope this help.

Sounds like the engine is idling to high. There is a procedure that you must go through to set it. Reply and I will let you know how to set it.

I had a problem with starts on my 98 sc2, did it twice only, but it would start up, shake a bit then shut down like it wasn't getting fuel, or a wrong mixture. Replaced the coolant temperature sensor and starts / idles like new now... goodluck

yes, this is the case of a failed throttle body, in which case it needs replaced, the car is getting too much fuel causing the high idle. this needs replaced asap. you could proably find a small independant honda shop that could do the work for less.

The system has to be reset by the Dealer. The computer is still reading a hard code stored. or There could be a mass air flow sensor out of range. The dealer or a local shop with the correct type of equipment should be able to check the Air Flow sensor and the Computer.

Check for a cracked or lose vaccumme line