B368 · B368 bypass valve
B368 bypass valve data is reported in several ways: fuel bypass, wastegate/bypass valve and EGR cooler bypass actuator. The lookup page should therefore make the ambiguity visible and route users by fault code and symptom.
Defect symptoms
- Reduced motor power and lazy spool-up
- Truck smokes more on hard acceleration
- Boost comes and goes instead of building cleanly
- Cold-start warm-up takes too long
- Coolant temperature slow to rise