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    VWVortex


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    Thread: 9 codes!!!!

    1. 10-01-2012 09:08 AM #1
      I have a 2001 1.8 t. It has started idling and running rough. I pulled up 9 codes P1421 P1425 P1426 P1427 P1428 p0300 p0302 & p0303. Any ideas why so many codes and what the problem(s) might be?

    2. Member VWBugman00's Avatar
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      10-01-2012 11:05 AM #2
      Quote Originally Posted by eley73 View Post
      I have a 2001 1.8 t. It has started idling and running rough. I pulled up 9 codes P1421 P1425 P1426 P1427 P1428 p0300 p0302 & p0303. Any ideas why so many codes and what the problem(s) might be?
      You, my friend, have some electrical issues. Check your fuses, make sure they're all good. Then check your grounds on the motor, make sure they're all solid, no cracks, or breaks. They're the tan colored wires. These are for injector harness for the p1425/6/7/8, your secondary air injector, and the 0300 codes are also for fuel injectors, likely related to the 1425/6/7/8 codes. I personally would go through the wiring on all 4 injectors and make sure they're not heat damaged.

      Best case scenario, you've got some popped fuses, and you can just replace those. Worst case, you'll have to replace the harness. Not a tough job, but time consuming, and honestly a little daunting.
      '00 Beetle, 1.8t T3S60, Brute Rods, Supertech Valve train (stock cam shafts for now), port and polished small port head, custom FMIC (pain in the a** on a Bug!), Bosch 440cc injectors, 3.5FPR, Catch Can, 2.0 Coils with Iridiums, Wilwood BBK, too much other stuff to list, too much $$ spent.

    3. 10-01-2012 11:41 AM #3
      Thanks for the help. I will give that a shot when I get home. A few people though it was my fuel filter. Sounds like I shouldn't worry about that. Can you clarify the popped fuses you mentioned in not exactly sure what to look for.

    4. 10-01-2012 11:48 AM #4
      Scratch that clarification on the popped fuses. I misread your post. Thanks I will post what I find out.

    5. Member VWBugman00's Avatar
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      10-01-2012 02:37 PM #5
      If you've changed your fuel filter in the last 30k or so miles, it should be fine. Otherwise, change it out regardless, just to eliminate it. Fortunately, they're not that expensive.
      '00 Beetle, 1.8t T3S60, Brute Rods, Supertech Valve train (stock cam shafts for now), port and polished small port head, custom FMIC (pain in the a** on a Bug!), Bosch 440cc injectors, 3.5FPR, Catch Can, 2.0 Coils with Iridiums, Wilwood BBK, too much other stuff to list, too much $$ spent.

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