DTC Inspection Priority Chart

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority chart.

NOTE:

If DTC U1000 and/or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000 and U1001. Refer to "DTC U1000, U1001 CAN COMMUNICATION LINE ".
If DTC U1010 is displayed with other DTC, first perform the trouble diagnosis for DTC U1010. Refer to "DTC U1010 CAN COMMUNICATION ".

DETECTED ITEMS AND PRIORITY REFERENCE

Priority	Detected items (DTC)
1	U1000 U1001 CAN communication line U1010 CAN communication P0101 P0102 P0103 Mass air flow sensor P0112 P0113 P0127 Intake air temperature sensor P0117 P0118 P0125 Engine coolant temperature sensor P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor P0128 Thermostat function P0181 P0182 P0183 Fuel tank temperature sensor P0327 P0328 Knock sensor P0335 Crankshaft position sensor (POS) P0340 Camshaft position sensor (PHASE) P0460 P0461 P0462 P0463 Fuel level sensor P0500 Vehicle speed sensor P0605 ECM P0643 Sensor power supply P0850 Park/Neutral position (PNP) switch P1610-P1615 NATS P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
2	P0031, P0032 A/F sensor 1 heater P0037 P0038 Heated oxygen sensor 2 heater P0075 Intake valve timing control solenoid valve P0130 P0131 P0132 P0133 P2A00 A/F sensor 1 P0137 P0138 P0139 Heated oxygen sensor 2 P0441 EVAP control system purge flow monitoring P0443 P0444 P0445 EVAP canister purge volume control solenoid valve P0447 P0448 EVAP canister vent control valve P0451 P0452 P0453 EVAP control system pressure sensor P0506 P0507 Idle speed control system P0550 power steering pressure sensor P0603 ECM power supply P0705 P0710 P0720 P0725 P0740 P0745 P0750 P0755 P1705 P1760 A/T related sensors and solenoid valves P1800 VIAS control solenoid valve P1805 Brake switch P2100 P2103 Electric throttle control motor relay P2101 Electric throttle control function P2118 Electric throttle control actuator
3	P0011 Intake valve timing control P0171 P0172 Fuel injection system function P0300 - P0304 Misfire P0420 Three way catalyst function P0442 P0455 P0456 EVAP control system (SMALL LEAK, VERY SMALL LEAK, GROSS LEAK) P0731 - P0734 A/T function P1148 Closed loop control P1217 Engine over temperature (OVERHEAT) P1564 ASCD steering switch P1572 ASCD brake switch P1574 ASCD vehicle speed sensor P2119 Electric throttle control actuator