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6E–233 ENGINE DRIVEABILITY AND EMISSIONS DTC P0406 – EGR High Voltage (Cont'd) Step No Yes Value(s) Action 11 1. Ignition “ON”. valve for voltage. Was measured voltage more than 4.8 V? more than 4.8 V Go to Step 12 Go to Step 12 12 1. Ignition “ON”. Was voltage more than 4.8 V? 4.8 V Go to Step 16 Go to Step 13 13 1. Locate short circuit at EGR harness between RED to RED or GREEN, RED to YEL. 2. Replace EGR harness. Is the action complete? — Verify repair — 14 Replace EGR harness. Is the action complete? — Verify repair — 15 Replace the EGR valve. Does DTC P1404 still fail “specific DTC test on Tech 2? — Go to Step 16 Verify repair 16 Replace the PCM. IMPORTANT: The replacement PCM must be UBS 98model year Immobilizer Workshop Manual. Is the action complete? — Verify repair — |