Some 2010 Chrysler Town & Country and Grand Caravan minivans with power adjustable pedals may illuminate the ETC light on the dash panel. When you connect your scan tool, you may find accelerator pedal position (APP) sensor trouble codes P2122 and/or P2127 in computer memory.
According to Chrysler, the problem is most prevalent on vehicles built before Sept. 16, 2009, and is due to an overly taut APP sensor harness under the dash. The taut harness, when combined with the adjustment of the pedals, causes the wiring to strain at the APP sensor, creating an intermittent connection. This then leads to skewed signals from the sensor, which results in the ETC light coming on and the code(s) setting.
Removing the harness' push pin retainer should create enough slack in the wiring to eliminate the condition.
The illustration shows what you'll see when you get under the dash of a Town & Country or Grand Caravan minivan. Notice the push pin retainer, shown at right. Remove it, clear the code(s), start the engine, then adjust the pedals with the switch.
If the ETC light stays off, the fix is complete.
If the light comes back on, replace the APP sensor.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via email at [email protected].