Hi and thanks for using 2CarPros. Com. Honestly, I do not know why that recommendation was made. Please keep in mind, when it comes to sensors for the emissions system such as a MAF, many are covered for eight years or 80,000 miles from the manufacturer.
Now for your code, he is correct. It is an underboost issue. Here are the possible causes. NOTE: None of them are related to the MAF sensor.
P0299
The ECM detects that the actual boost pressure is less than the desired boost pressure for greater than 2.5 s.
Action Taken When the DTC Sets
- DTCs P0234 and P0299 are Type B DTCs.
- The ECM will disable boost control and limit the system to mechanical boost only, resulting in a substantial decrease in engine power.
Conditions for Clearing the DTC
DTCs P0234 and P0299 are Type B DTCs.
Diagnostic Aids
- The charged air cooler is connected to the turbocharger and to the throttle body by flexible duct work that requires the use of special high torque fastening clamps. These clamps cannot be substituted. In order to prevent any type of air leak when servicing the duct work, the tightening specifications and proper positioning of the clamps is critical, and must be strictly adhered to.
- Insufficient preload between the wastegate lever and actuator rod may allow the wastegate to open slightly when commanded closed, and result in P0299 being set.
- Oil ingestion or contamination of the wastegate solenoid valve may cause DTC P0299 to set.
- Charge air cooler icing may cause DTC P0299 to set.
I have attached pictures of the waste-gate solenoid for your review. I suggest removing it and check for contamination. It sounds like it may be hanging open a bit and allowing a loss of boost pressure.
Let me know if this helps.
Take care,
Joe
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Friday, June 1st, 2018 AT 9:29 PM
