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Thread: My engine light just pop out!

  1. #1
    Senior Member
    Join Date
    Sep 2008
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    196

    Default My engine light just pop out!

    Hey Guys, every since i got my truck back Ive been having many problems that have not occur before my accident.

    Here is what we changed, changed air filter, spark plugs, efans, hid headlights and fog lights, throttle body cleaned, fuel injector clean, oil change, 22 gal tank (only the tank and the fuel lines that was changed).

    But now Im getting several problems such as:

    1) -.7 decrease in gas milegage
    2) stalling or hesistation problem when shifting from 1 to 2(fix the pedal problem thanks to Erik's tune)
    3) electrical problem
    4)engine light (after this showed up ive been having problems moving the truck as if it lost power.
    5) On of the bulbs for the HID blew out and I just got them.
    6) the dome lights keep popping out when we configure the DIC to turn it off
    7) My engine light just lighted up
    8) The Battery reader on the DIC keeps swing over and under 14.

    Why is this happening?

    Ive also have been getting these problems shown on efilive

    Specifically Monitor Tests: Failed

    Excess Vacuum Pass Test 2 $02 $86 0.0000 6.0000 Minimum Integral index-seconds
    Purge Leak Pass Test $02 $91 0.0000 12.0000 Minimum Seconds
    Weak Vacuum Test 2 Vacuum $02 $B0 0.0000 31.8000 Minimum seconds
    Weak Vacuum Test 2 Vapor $02 $C0 0.0000 6553.5000 Minimum Seconds

    System Readiness Test EPA: Incomplete

    Number Of Emission-Related Trouble Codes (N/A)
    Misfire Monitoring (Ready)
    Fuel System Monitoring (Ready
    Comprehensive Component Monitoring (Ready)
    Catalyst (Not Ready)
    Heated Catalyst (Not Supported)
    Evaporative Purge System (Not Ready)
    Secondary Air System (Not Supported
    A/C System Refrigerant (Not Supported)
    Oxygen Sensor (Not Ready)
    Oxygen sensor (Heater Not Ready)
    EGR System (Not Supported)

    Here are the codes:

    1) P0757 Shift Solenoid Value B Stuck on (Status EPA and MH)
    2) B1440 Power Mode Master Input Circuits Mismatch
    3) B2961 Key Ignition Circuit

    What do they mean?

  2. #2
    Senior Member
    Join Date
    Sep 2008
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    196

    Default

    anyone???

  3. #3
    Lifetime Member
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    Mar 2006
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    4,935

    Default

    The first code refers to the transmission, have you cleared the codes yet? If they come back then you're probably going to have to have some transmission work done to replace the shift solenoids. The key ignition circuit is interesting, with my remote start Ive gotten a key in ignition circuit but it was because my bypass module wasnt working properly.

    Im wondering if you're PCM is faulty with all these problems you've been having. And all of these issues popped up after your accident? Maybe take it back to where you had it fixed and have them fix it, should be covered by insurance from the accident.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  4. #4
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Have them specifically look at the following:
    - alternator/regulator overcharging or overvolting;
    - PCM as Erik said;
    - EVAP system plumbing, solenoids, fuel tank air/vac leak;
    - Possible BCM problems;
    - Other wiring problems like bad/missing ground connections;

    They have to get an experienced diagnostic technician to find the problem(s).

  5. #5
    Senior Member
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    Default

    I cleared the code, but it was not the same before the engine light came out, a lil improvement though. and yes everything occurs after the accident.

    http://forum.efilive.com/showpost.php?p=86682&postcount=32

  6. #6
    Senior Member
    Join Date
    Sep 2008
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    196

    Default

    so you basicly want to cut this part out only from this to this?



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