DT466- Updated I6 EVRT/VGT Diagnostics - tech tip

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Title: Updated I6 EVRT/VGT Diagnostics Check Sheet and Turbocharger Repair Procedures for engines that exhibit DTC 353 / 354


Applies To: 2004- 2006 MY EGR DT 466 and 570 with EVRT/VGT Turbos with ESN 2,000,001 - ESN 3,000,000



Customer Complaints:

1. Low Power (Can be intermittent)
2. No Acceleration
3. Excessive Smoke.
4. Engine Light on , DTC 353 and /or DTC354 Active or Inactive


Possible Diagnostic Codes DTC 353 - Variable Geometry Turbo control over duty cycle. DTC 354 - Variable Geometry Turbo control under duty cycle.

Possible Causes:

The ECM logs DTC 353 and/or DTC 354 codes when the Exhaust Back Pressure
(EBP) is too high or too low for specific engine operating conditions.

ï Turbocharger actuator (SRA) binding or sticking.- Repairable or Replacable

ï Turbocharger linkage binding or sticking. - Repairable or Replacable

ï Pivot Shaft binding in the actuator (SRA) Flange Bushings. - Replacable as Pivot Shaft Flange Kit

ï Intermittent or low voltage/ground to turbo actuator (SRA). - Repairable

ï Incorrect pressure reading from the EBP sensor. - Repairable

ï The turbocharger vanes or other EVRT/VGT components internally binding, sticking or damaged.- May Not Be Repairable , May need the Turbocharger replaced.

ï Plugged/damaged exhaust system or catalyst/muffler. - Repairable


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