Thread: HFM Code 77 (CO potentiometer Input short to positive)
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Old 09-06-2008, 04:24 AM
PhantomLord PhantomLord is offline
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Join Date: Jan 2008
Posts: 92
Yes the code I got was code 10 (Hot film air mass sensor, open circuit). And my car does not have built in Led/SW combo.

I have seen code 77 listed only in cs1000_mb.pdf and some Russian site, but it mentions for non KAT versions only.

Is it O2 Sensor faulty or some wiring issue?, I have yet to replace the wiring harness/loom.

Thank you Dalton.
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