DTC P1488: AUXILIARY 5 VOLT OUTPUT TOO LOW Monitor & Set Conditions Auxiliary 5-volt output circuit is monitored with ignition on engine off, and with engine running. DTC may set if voltage on 5-volt sensor supply circuit is less than 4.3 volts for 5 seconds. Possible Causes Manifold Absolute Pressure (MAP) Sensor Camshaft Position (CMP) Se