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Home >> BMW >> 1994 >> 850CSi >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self Diagnostics >> Diagnostic Tests >> DTC 37: Sensor Heater Relay >> Explanation
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DTC 37: Sensor Heater Relay: Explanation

Oxygen sensor heating relay is activated by DME control unit I. For this reason, a detected defect is only stored in the DME control unit I. The control unit detects a short or break at the relay or on its supply wire.

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