p1494

  1. Colben_22

    Check Engine Codes P0031, P0051, P0138, P1494, & P0136

    I bought my Jeep a few months ago and shortly after I got home with it some check engine lights came on. I haven't had much time to work on it yet, but I am trying to diagnose the main problem first. The codes it is throwing are P0031 (Oxygen (A/F) Sensor Heater Control Circuit Low Bank 1...
  2. Zman

    Code 1494: Evap System Leak

    I have a persistent engine code 1494. Evap system malfunction Anyone else have to troubleshoot this ? Thanks, Zman
    • Zman
    • Thread
    • 1494 evap leak evap system evaporation system evaporation system leak p1494
    • Replies: 13
    • Forum: TJ General Discussion
  3. M

    EVAP gurus wanted

    Hey everyone, I've posted this on another forum, hopefully I'll have better luck here. I have a 97 Tj 4.0 with a check engine light that has me stumped. The code is p1494 [Leak Detection Pump Switch or Mechanical Fault. Incorrect input state detected for the Leak Detection Pump (LDP) pressure...
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