[apex]

Happy New Year to all! [img]style_emoticons/<#EMO_DIR#>/tongue.gif[/img]

My car gave me a new year's gift via check-engine Hall Sender code 1-1-3-4.

The helpful forum code list is here.

Does this code refer to the front (cam) sender or the rear (flywheel) sender? Is there a separate code for one or the other?

Just installed a brand-new cam sensor this summer as part of my head rebuild. The crank sender is a bit heat-blasted so perhaps that's my failure point... but I don't know which unit the CEL refers to.

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[Johannvb]

I'm not 100% sure on this, but I believe that if the rear sensor fails the car will not start.

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[John]

Its the one in front, in back of the distributor. Got this same code once, and unplugging/replugging the connector cleared the code. If no joy, inspect the connector. Its in a high heat area and is known to fail.

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[apex]

Thanks guys - that's a help.

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[apex]

The story continues. I took the car in to IMA in Fairfax where we replaced some bad wires and the connector at the end of the harness. Faults were cleared. Check engine light was off.

But now it's back and the blink test is reporting 1134 again.

At this point - most of what's in there is brand new: the tail end of the harness, the connector, the sender itself. Always possible that there's a bad connection somewhere. If not - looks like the timing gear will need to come off for a visual inspection.

I couldn't find a diagnostic in the manual - is there a procedure to troubleshoot the circuit by checking voltages? Is there a detailed description somewhere of how the hall sender works?

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[flash]

the hall sender itself fails, and does so in an intermittent fashion

change it

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[apex]

That's good to know, flash, thanks. [img]style_emoticons/<#EMO_DIR#>/happy.gif[/img] Ha! yeah - this is where I wish I'd kept two of the group by hall senders! Back to sunset and dealer pricing. [img]style_emoticons/<#EMO_DIR#>/angry.gif[/img]

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[flash]

no worries - mine blinked on and off a few times before it finally just blew apart

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[apex]

Bleh - I've replaced the old hall sensor with a new one and still have the code.

What's next? I took a look at the wiring diagram - the Hall Sender is VERY simple - just two wires surrounded by a shielding mesh that goes back to the DME.

   

The easy first step is to trace continuity between the sender and the DME - never done that but I suppose I can figure it out. :-)

Other than that - what other failure modes come to mind? Can anything else throw this code other than the Hall Sender itself or wiring to it?

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[flash]

did you disconnect the battery to clear the codes?

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[apex]

Ha - no! didn't realize that was the trick to clearing codes. I'll do that asap and report back.

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[flash]

yeah - they don't go away on their own

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[apex]

well you learn something every day - just went out and disconnected the battery for 10 secs, reconnected, started the car, voila! no CEL.

thanks flash, for the tip.

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