HE90 - Inspect EGR System For an Intermittent Failure

- key off.

- Visually inspect the EGR system for signs of intermittent failure.

- Is a fault found?

YES -- SERVICE fault as necessary. RECONNECT all components. Complete PCM reset to clear DTCs. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

NO -- GO to HE91. HE91 - Check EGR Valve Operation