Er HC
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This is a discussion on Er HC within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; driving my 05 legacy gt this morning. stopped at a light and the engine died. Didint start after that. the ...

  1. #1
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    Er HC

    driving my 05 legacy gt this morning. stopped at a light and the engine died. Didint start after that. the message display Er HC. It was rainning. Need help please.

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    Sammich Makin' Pwincess wrxtreme06's Avatar
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    http://legacygt.com/forums/showthrea...5.html?t=43375

    maybe something in that thread will help

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    Er HC Legacy Gt Ltd

    Tried all of those. Still didnt start. The scanner wouldnt read my computer. Coolant, oil is fine. I think water might have got into something since it was raining. The car was working fine until i stop at the traffic light. Weird.

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    Registered User EvoEatr's Avatar
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    Quote Originally Posted by kirk83 View Post
    Tried all of those. Still didnt start. The scanner wouldnt read my computer. Coolant, oil is fine. I think water might have got into something since it was raining. The car was working fine until i stop at the traffic light. Weird.

    This means Error High CAN communication, this is basically saying that something in the high speed controller area network has happened such as a signal interference or something along those lines... There might be a code in the BIU or the ECM or the TCM first step is to pull/ check those...Right around 05 with Subaru certain aftermarket scanners where not compatible I have one scanner which doesnt work with any Subaru 05-up and another one that does... Try unplugging the combo meter, the BIU, If you have automatic climate control unplug the automatic climate control module, and unhook the battery negative terminal.... How many miles are on the vehicle? I am assuming you have done a thorough visual inspection of the vehicle?

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    Er HC Legacy Gt Ltd

    It has 53278 miles. I unplug the computer and the biu. the error is still there. im sure it has something to do with some water. I just dont know which sensor or part the water hit.

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    Registered User jd92677's Avatar
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    Quote Originally Posted by kirk83 View Post
    It has 53278 miles. I unplug the computer and the biu. the error is still there. im sure it has something to do with some water. I just dont know which sensor or part the water hit.
    Don't know if you tried this already but if you're getting no communication to your scanner that you have used before and have gotten communication with (I'm assuming?), I would check your ECM fuse. A long shot but maybe it's blown

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    Er HC 05 Legacy Gt Ltd

    I checked all the fuse and relay in the engine bay and under the dash. All was ok. Guess ill have to bring it in to subaru

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    Registered User EvoEatr's Avatar
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    Quote Originally Posted by kirk83 View Post
    I checked all the fuse and relay in the engine bay and under the dash. All was ok. Guess ill have to bring it in to subaru

    Have you checked all the ground connections in the engine bay?

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    Er HC 05 Legacy Gt Ltd

    Yes i checked every one.

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    Registered User EvoEatr's Avatar
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    Quote Originally Posted by kirk83 View Post
    Yes i checked every one.

    So what happens when you try to start the vehicle? does it crank over? Do you hear the fuel pump kicking on?

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    Er HC 05 Legacy Gt Ltd

    The fuel pump comes on but no crank. It does the same thing it would if i dont press the clutch pedal. Nothing at all happen. Once i turn the ignition on the dash lights up the Er HC error so i think thats y it doesnt crank.

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    Registered User EvoEatr's Avatar
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    Quote Originally Posted by kirk83 View Post
    The fuel pump comes on but no crank. It does the same thing it would if i dont press the clutch pedal. Nothing at all happen. Once i turn the ignition on the dash lights up the Er HC error so i think thats y it doesnt crank.
    Have you tried wiggling wires around for the SMJ ( Super multiple junction ) and other connectors and sensors in the engine bay? Do you have any mods on the vehicle?

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    Er HC 05 Legacy Gt Ltd

    I disconnect and reconnect all wires and sensors. I have a magnaflow catback, Perrin air intake and a turbosmart BOV which have been on the car for about 3 months.

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    Quote Originally Posted by kirk83 View Post
    I disconnect and reconnect all wires and sensors. I have a magnaflow catback, Perrin air intake and a turbosmart BOV which have been on the car for about 3 months.
    Does this happen to be a cold air intake in which the filter is located in the fender? Did you clean the MAF?

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    Er HC 05 Legacy Gt Ltd

    It points towards the fender hole but its not inside the hole. I didnt clean the MAF.

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