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My 06 CTTS is throwing a fault code for the knock sensor and low boost pressure. It starts and runs and sounds just fine and is only slightly noticeable when I stomp on the pedal. Then, it does not have the power it normally does. Also, sounds like air coming out exhaust. Doesn't seem to build boost. Maybe electrical issue or faulty wastgate? Any ideas?

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  • Admin

P0299 Boost Pressure Control Deviation - Below Limit

Possible cause of fault- Leak between turbocharger and throttle valve- Overrun recirculating air valve faulty (leaking)- One or both turbochargers sluggish or stuck

P0329 & P0334 are knock sensors faults and are likely due to air leaks.

Check intake distributor for leaks and exhaust manifolds.

Use a smoke machine to detect the leaks if needed.

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