Medium and Heavy Trucks
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Code 92 is an intake valve actuator #1 or #2 fault.
The common causes
-Intake valve actuator harness or intake valve actuator solenoid or housing
Check for studs for the intake valve actuator which are known to break
If replacing the IVA solenoids dont correct code 93 and the wiring is OK, you have a faulty IVA housing and it must be replaced. Let me know