Question about 2002 Volkswagen Jetta TDI

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02 TDI jetta

What is the cure for code PO 234 over boost?

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  • Anonymous Jun 26, 2008

    My brakes have started jerking when I apply them, some of the time. It also makes an air noise as if the booster is doing something Is this sort of the same thing? I have told several mechanics, but as of yet it hasn't done it for them.

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  • 36 Answers

Check vaccuum lines , one could be off or leaking

Posted on Jun 30, 2008

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I have a 2002 vw jetta tdi diesel, the engine lite keeps coming on usually on a hill, but not always. sometimes it goes ou. i hooked up a code reader and code po234, overboost came up. what do I need to...


Boost is controlled by the N75 solenoid with vac' hoses to the vane controller built into the turbo.

When light comes on it indicates too much boost and will reduce fuel delivery to reduce power.
A '' key off/key on'' cycle will reset it if you on the road.

When an over boost occurs it is best to first change the N75 Solenoid Valve and or check the hoses from and to it for displacement or splits.

Before removing the valve, make a note of where the hoses fit.

Common component failure.

Jan 17, 2011 | 2002 Volkswagen Jetta TDI

1 Answer

P1176 2000 VW JETTA ALREADY CHANGED THE 02


17584/P1176/004470 - Bank1: O2 (Lambda) Correction Behind Catalyst: Control Limit Reached Possible Causes
  • Intake Air System leaking
  • Oxygen Sensor(s) and/or Oxygen Sensor Control faulty
Possible Solutions
  • Check Intake Air System for Leaks (False Air)
  • Check Oxygen Sensor(s) and/or Oxygen Sensor Control (all of them!)
This is the pre 02 sensor located before the catalytic converter.

May 10, 2010 | 2000 Volkswagen Jetta TDI

2 Answers

Jetta 2000 tdi 1.9 i need location tr switch code


The switch just may be out of adjustment.

its location is on the transmissiom by the shift cable bracket

Mar 03, 2010 | 2000 Volkswagen Jetta TDI

1 Answer

03 jetta tdi, hit some tracks and broke the oil pan. Lost all oil. Installed new oil pan, added oil. Car runs good but no boost. Code po299. Any ideas?


you need to find out if you did any damage to the camshaft give these websites a try www.alldatadiy.com and www.autozone.com if all fails stop by your local library and get your hands on a Haynes auto repair manual for your car wish you the best of luck Michigan Man.

Mar 02, 2010 | 2003 Volkswagen Jetta TDI

1 Answer

2002 jetta tdi, got code po 725, p1780, p1850. Transmission starts in second gear and will not go in to fourth gear. Any help? Thank you


i had a few of these pop up. The PCM and the ECM had a brain fart. Have the codes cleared and if you have the same luck as me all will be back to normal. That was the fix...

Dec 22, 2009 | 2001 Volkswagen Jetta TDI

2 Answers

1999 tdi 1.9L eci code p1550. loss of power on hills


Its not your clutch. Its one of three things which is regards to your turbo.
17958/P1550/005456 - Boost Pressure Controle Valve (N75): Control Deviation

Possible Symptoms
  • Irregular behaviour
  • Reduced power output
  • Limp mode
Possible Causes
  • Hoses/Pipes incorrect connected, disconnected, blocked or leaking
  • Charger Pressure Control defective
    • Solenoid Valve for Boost Pressure Control (N75) defective
  • Turbocharger defective
Possible Solutions
  • Check Hoses/Pipes to/between Components
  • Check Charge Pressure Control
    • Check Solenoid Valve for Boost Pressure Control (N75)
  • Check turbocharger

Nov 14, 2009 | 2000 Volkswagen Jetta TDI

1 Answer

The radio just turned off in my 02 vw jetts


This seems to be a common problem with this series of radio. If you open the drivers door and pop the fuse panel cover off the side of the dash, then locate fuse number 42 ( should be 25 amp). Remove the fuse, check to see if it is blown(it usually isn't), if it isn't blown leave it out for about 30 seconds to 1 minute and then reinstall. Hope this helps it worked on my 02 Jetta TDI.

Nov 07, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

P0106 map sensor code on tdi


02 jetta map sensor code p0106 and faulty boost sensor code p0238

Sep 28, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

Po 252


hi changing glow plugs is nothing to do with this code i would change the fuel filter and put a injector cleaner into the fuel tank as if this doesn,t cure the problem the only other thing that affects the pump is the timming belt has it slipped a tooth is there a marked drop in preformance if not these pumps are expensive very expensive best of luck yates210456

Sep 14, 2008 | 2000 Volkswagen Jetta TDI

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