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Home >> Volvo >> 1995 >> 850 GLT, 4D Sedan, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Engine Controls - Tests W/Codes - Non-Turbo (M/T) - MOTRONIC 4.4) >> Circuit Tests >> DTC 445 - Pulsed Secondary Air Injection System (Pair) Pump Signal >> Possible Causes (Signal Too Low)

Possible Causes (Signal Too Low)

WARNING: This page is about a different car, the 1996 Volvo 850. However, it is still accessible from the selected car via links, so may be relevant.
  1. Open-circuit in signal cable or power cable
  2. Short-circuit to ground in signal cable
  3. Contact resistance in terminals
  4. Defective PAIR pump relay
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