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Home >> Volvo >> 1998 >> S70 Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Tests >> DTC P0530/EFI 225, DTC P0531/EFI 225, DTC P0532/EFI 225 & DTC P0533/EFI 225 (Turbo) >> Diagnosis (Faulty Signal, Permanent Fault)

Diagnosis (Faulty Signal, Permanent Fault)

  1. Ensure A/C system is functioning correctly. If A/C system is not operating correctly, repair as necessary. If A/C system is OK, try a new air conditioning (A/C) pressure sensor. Go to next step.
  2. Verification After carrying out the repair, check that the fault has been remedied as follows:
    • Turn ignition off
    • Air conditioning (A/C) pressure sensor and engine control module (ECM) connected
    • Start the engine and idle it
    • Air conditioning (A/C) switch on
    • Blower fan on
    • Wait until the air conditioning (A/C) compressor has started
    • Select Volvo Scan Tool, or aftermarket scan tool, to read off DTCs. If EFI-225 is stored it should have intermittent status.
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