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SIR codes R043 R081


jdelhorbe

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The car has 37,000 miles, I have had it since it was new, it has never been in an accident. It is a 1993 Seville STS/Northstar. The Service Supplemental Message

showed up at 36,900 miles. Clear codes will not clear the R081 or the R043. The car is mint under the hood and inside. Could the Dual Pole Arming sensor be bad, or did the DERM die. I dive the car about 50 miles every week.

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RO43: Drivers source feed low

RO81: Drivers ignition diode open

Could be either the dual pole sensor, the DERM, or wiring. Do you have the factory service manual?

You will need to follow the diagnostic checks in the service manual.

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