mobile-menu-icon
GM Authority

Z71 starting problems: code P0174

Viewing 1 reply thread
  • Author
    Posts
    • #749600
      chickendenny
      Participant

      My Z71 starting problem is if the truck is cold it starts immediately but if it is hot it will turn 10 or 15 times before it starts. I have replaced injectors, crank sensor, fuel pump, knock sensors, mass airflow , o2 sensor. It all started when i replaced the injectors. It also is showing code p0174. Cannot figure it out. thanks

    • #749613
      [email protected]
      Participant

      That code is showing a lean condition on bank 2 and when an engine is cold the parts contract but when it gets hot it expands and that could be a vacuum leak. If you removed any of the intake system or parts that are attached, they may now be causing your problem. Could also be a map sensor. If you also get a p0171 then it is more than likely an intake leak.

Viewing 1 reply thread
  • You must be logged in to reply to this topic.

Subscribe to GM Authority

For around-the-clock GM news coverage

We'll send you one email per day with the latest GM news. It's totally free.