Question about 2002 Volkswagen Jetta TDI

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I have a 2002 Jetta TDI. The problem I have is the engine will suddenly esperience a power loss. I'll turn off the engine for just a few seconds and restart. The problem will temporarily go away. Intially it would not throw a code but now it is. I took it to Auto Zone and had the codes read. P0245 Wastegate solenoid "A" Low and a P0216 Injector control circuit. I need to know if these codes are even accurate? I bought a Haynes manual and those codes weren't even listed for the TDI. Should I begin by looking at the waste gate? Is there a electric solenoid that controls the wastegate? Where is it located? Can a problem with the wastegate cause injector timing circuit problems? Thanks for your time Randy

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Hi Randy

I am confident your real issue is the wastegate solenoid and the injector circuit has only arisen as a result of the previous... in other words sort the P0245, clear the codes and it is quite likely it will be ok from there on.

What we need to address here is the cause, this can be a dirty air filter which has fouled the hot wire in the mass air flow causing a fluctuation of the grams per second info given to the ECU this in turn will impact on the fuelling causing carbon build up in the cylinder head.

This carbon (Black soot) sticks to the EGR valve, works it's way through the vac tubes linking to the waste gate solenoid etc

Early signs of this issue are fault codes like you have.

Remedy - avoid buying parts at this stage. Run a branded EGR cleaning chemical though the system. Here in the UK we have Wynns or Forte, they are very good. Ensure all the small thin pipes are clean and you can blow through them.

Get Autozone to check the Gsec on the MAFS ensuring it is within range and steady at idle.

Let me know if I can be of any more assistance

Kind regards

Lloyd

Posted on Sep 09, 2010

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