Question about 1997 Toyota RAV4

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1997 Toyota rav4 Had serpentine belt and timing belt changed and all gaskets on engine, was hit on left driver side front fender on the way home and my check engine light came on. I'm told the hit didn't cause the light to come on. Flush was done on the egr system and vacuum modulator replaced. Light came back on a couple days later. Mechanic can't figure out what is wrong, light was off for a couple of weeks and just came back on.

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  • Jeremy W.
    Jeremy W. Oct 13, 2010

    What code is causing the light to come on?

  • reverdy1996 Oct 14, 2010

    The original code done after the accident to determine if the issue could have been caused by the accident was code P0401 Exhaust Gas Recirculation Flow insufficient Detected

  • reverdy1996 Oct 14, 2010

    After the light came back on, my mechanic took the car back and tested it (I'm guessing for issues as you've mentioned) and didn't find any problems while the car was running. He told me that either the car is having an intermittent problem that is causing the light to come on, but then the problem goes away or the computer is picking up a problem that is not there. He ended up saying he would have to do some research. He did the reset and when I got the car back, the light has actually stayed off for a couple of weeks, but it came back on this week.

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If its the same code it should be fairly easy to see if the EGR valve is functioning correctly. Its vacuum operated so with the engine running you can apply vacuum to the solenoid and expect the engine to run extremely bad if not stall. If it does than you can move on to the solenoid that controls the valve.

If it doesn't stall the engine or make it idle bad than you'll need to look closer at the EGR valve, the exhaust supply pipe or the inlet into the intake which could be partially blocked with carbo build up.

If the code is different that you'll have to take a look at whatever system it is pointing to.

Posted on Oct 14, 2010

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insulator.

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