TEST ACTION APPLICABILITY
7 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
8 NOTE: The engine will run rough and possibly stall in the following test.
Feather the accelerator pedal to keep the engine from stalling.
Start the engine.
With the DRBIIIt, enter Engine System Test and then EGR System Test. Push the
4=VARIABLE function.
Monitor the EGR voltage while slowly pushing the up arrow.
Is the voltage change smooth?
All
Yes → Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Replace the EGR Solenoid Assembly.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
158
DRIVEABILITY - NGC
P0406 - EGR POSITION SENSOR HIGH — Continued
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