1998 Camry LE 2.2 5S-FE High Idle Quick Fix

This is a quick $10 fix for those who are experiencing high idle problems with the 5S-FE 2.2 4 cyl in many Toyota products. Directions follow in this description.

Check your engine coolant temperature sensor before checking any other parts! It's an easy check, is inexpensive to replace, and takes a single 19 MM wrench and a few minutes.

Directions:
Warm up the car to operating temperature, shut it off, locate your coolant temperature sensor (green plug on the harness) and unplug the sensor. Re-start the engine, and it should idle normally, around 850 RPM. If this happens, don't touch anything else! Replace your sensor, and you're back to normal.


When you replace the sensor, use a 19 MM wrench. Have the new sensor within arm's reach. Break torque on the senor, and back it off until it can be loosened by hand. Unscrew the sensor by hand the rest of the way. When it comes loose, put a finger over the hole in the manifold to prevent coolant loss. Set aside the old sensor, pick up the new one, and thread the new sensor in, being careful to minimize coolant loss. Tighten enough to ensure a good seal and prevent loosening in the future - do not overtighten! Plug the harness back in, and start the car. Your idle should return to its normal range, approximately 850 RPM.