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Home >> Suzuki >> 2001 >> XL-7 Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Engine Controls - Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P0406: Exhaust Gas RECIRCULATION System - Circuit High Input >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2002 Isuzu Rodeo Sport and 2002 Isuzu Rodeo. However, it is still accessible from the selected car via links, so may be relevant.

Inspect for poor connections or damaged connectors. Observe ACTUAL EGR POSITION display on scan tool while moving all related harnesses and connectors. Ensure EGR is properly mounted. Check for signs of restricted exhaust. Check FREEZE FRAME ECT sensor data to determine if vehicle was cold when DTC was set. Due to moisture in exhaust system, EGR valve may freeze or stick in cold climates, and when engine temperature rises or is brought into a warm shop, problem could disappears. Reviewing FAILURE RECORDS vehicle mileage since last failure may help determine how often condition that caused failure occurred, and may assist in diagnosing problem.

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