Fault Conditions

DTC EFI-225 (A/C pressure sensor, signal) is stored if the ECM receives a signal from the A/C pressure sensor corresponding to a pressure above about 450 psi (31 bar) (signal high), or below about -1.2 psi (-0.08 bar) (signal low). When the engine is started with an engine temperature below 104°F (40°C), A/C pressure should rise by at least 13.5 psi (95 kPa) within 8 seconds. DTC EFI-225 (faulty signal) is stored if pressure does not rise sufficiently.