SFI SYSTEM (w/o Secondary Air Injection System) CHECK FOR INTERMITTENT PROBLEMS

Tech Tips

Intelligent tester:

Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with an intelligent tester when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which has a higher sensitivity to malfunctions than normal mode (default), which uses 2 trip detection logic.


  1. Clear the DTCs Click here.

  2. Change the ECM from normal mode to check mode using the intelligent tester Click here.

  3. Perform a simulation test.

  4. Check and wiggle the harness(es), connector(s) and terminal(s).