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    Thread: golf code of p1255, p0300,p0301,p0302,p0303,p1128 and p0140

    1. 01-24-2012 12:45 PM #1
      I had these codes after starting the engine. Was wondering should i go after the coolant sensor or the o2 sensor or something else. I've read some conflicting information about what would cause the issue. Some said the coolant sensor but ive read that the computer has a back up input for mixture scheduling. I have also read that the 02 sensor(post converter) is not used for mixture either. If this was a br710 on a gulfstream, i would have it wrapped up. Car engines tend to be more difficult to troubleshoot.

    2. Member Rockerchick's Avatar
      Join Date
      May 10th, 2005
      Cary, NC
      '03 BMP 20th GTI, '84 TD Jetta
      01-24-2012 12:47 PM #2
      Your 300 codes are for misfires (300 is random misfire, and each one after that is pointing to a specific cylinder 301 = misfire cyl 1, etc). 1128 is for an O2 sensor, as is P0140 (no activity). 1255 is the CTS short to ground.

      What engine do you have? Miles? Anything going on with the car?
      Quote Originally Posted by TM87 View Post
      VW-making mechanics out of owners since 1957.
      The project - '84 Jetta 1.6TD
      The Wheelbarrow - '82 Rabbit Pickup
      Hers - '03 BMP 20thAE GTI
      His - '16 GLI SE

    3. 01-24-2012 01:10 PM #3
      Its the AEG 2.0 engine before october. It has 105,000 on the engine.

    4. 01-24-2012 01:26 PM #4
      no issues going on

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