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Ignition coil trouble 2007?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Hoopla, Jun 11, 2008.

  1. Hoopla

    Hoopla New Member

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    I have a 2007 Prius and it's in the shop and the techs are stumped -- the code said to replace the ignition coil, so they did that. They took it on a test drive and it died within two miles. They restarted it and brought it back to the shop. Took it on a 20-mile test drive and couldn't get it to die again, so they're giving it back, but not very confidently.

    Any ideas? Here's what led up to this: Two weekends in a row, I got the "triangle of death" and check engine light. The car would hesitate and shudder and not really respond when I hit the accelerator. I'd have to pull over, turn it off and re-start it again to get home. After letting it sit, the warning lights would go away. Finally brought in in on Monday and now it's Wednesday and no solutions. Help!
     
    #1 Hoopla, Jun 11, 2008
  2. efusco

    efusco Moderator Emeritus
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    What were the DTC codes?
    Does the Prius have an ignition coil??!!
     
    #2 efusco, Jun 11, 2008
  3. hyo silver

    hyo silver Awaaaaay

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    I had a similar problem, and had two coils and two plugs replaced. Apparently there's a design flaw with water getting in to the engine compartment and rusting out the electrics.

    I'm not sure why yours would stop, Hoopla, after a coil replacement, but it's possible the problem lies with the other coil, or perhaps a plug. Or maybe one of the wires wasn't put back on properly the first time. If it's running smoothly now, let's hope it's fixed.
     
    #3 hyo silver, Jun 11, 2008
  4. Hoopla

    Hoopla New Member

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    I don't remember the code number, but it did indicate ignition coil. I mentioned the service bulletin that went out on 2005-2005 Prius' regarding the water getting in, but the tech said that problem doesn't seem to extend to 2007 models.
     
    #4 Hoopla, Jun 11, 2008
  5. Patrick Wong

    Patrick Wong DIY Enthusiast

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    If the code was DTC P030x (where x is the cylinder number) then the possible causes are:

    Open or short in engine wire harness
    Connector connection
    Vacuum hose connection
    Ignition system
    Injector
    Fuel pressure
    Mass air flow meter
    Engine coolant temperature sensor
    Compression pressure
    Valve clearance
    Valve timing
    PCV hose connection
    PCV hose​
    ECM

    If the code was P035x (where x has the same meaning as above) then the possible causes are:

    ​
    ​
    Ignition system​

    ​
    ​
    Open or short in IGF or IGT1 circuit between ignition coil with igniter and ECM​

    ​
    ​
    No.x ignition coil with igniter​

    ECM
     
    #5 Patrick Wong, Jun 11, 2008
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