Diagnostic Aids

If DTC P1516 is also set, diagnose that DTC first. A short between Brown wire and Yellow wire may have caused the ECM internal driver to overheat and set P1519.

If DTC P1519 is set, the ECM will default to one of the two limp home modes (random injector disable with engine speed limited to 1800 RPM). The REDUCED POWER telltale will be illuminated and the ECM will remain in this condition for the entire ignition cycle even if the fault is corrected.

Ensure the ECM is bolted securely to the intake manifold. If P1516 is not set and the ECM is secured correctly, replace ECM.