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Intermittent Electronic Throttle Control (ETC) Safety Mode While Driving
Travis Dewitz uses a MODIS and a set of AES' ST3 Test Leads and a low amp probe to help him locate the source of the problem on a Lincoln LS 3.9.
The first thing I did was scan all of the vehicle’s modules for trouble codes. The only trouble code present was in the PCM which was a P1270, rev limit reached.
During the last few test drives, I experienced the issues during a full throttle acceleration from a dead stop; which never happened before. Also, the LS went into ETC safety mode with an idle only condition twice. When this happened it set a P2112 (throttle actuator control system – stuck closed) and a P2104 (throttle actuator control system – forced idle). Now how do these three codes and symptoms all relate with each other?
Read the complete case study and view all the labeled screenshots at: DewitzDiagnosticSolutions.com.
