MPI <4G9> -
Troubleshooting
13A-86
Code No.
Diagnosis item
P0403
EGR valve system
P0420
Catalyst malfunction
P0443
Purge control solenoid valve system
P0505
Idle speed control system
P0551
Power steering fluid pressure switch system
NOTE
1. If the engine warning lamp illuminates because of a malfunction of the engine-ECU <M/T> or
engine-A/T-ECU <A/T>, communication between MUT-
II
and the engine-ECU <M/T> or engine-A/T-ECU
<A/T> is impossible. In this case, the diagnosis code cannot be read.
2. After the engine-ECU <M/T> or engine-A/T-ECU <A/T> has detected a malfunction, the engine warning
lamp illuminates when the engine is next turned on and the same malfunction is re-detected. However,
for items marked with a “
L
” in the diagnosis code number column, the engine warning lamp illuminates
only on the first detection of the malfunction.
3. After the engine warning lamp illuminates, it will be switched off under the following conditions.
(1) When the engine-ECU <M/T> or engine-A/T-ECU <A/T> monitored the power train malfunction
three times* and met set condition requirements, it detected no malfunction.
*: In this case, “one time” indicates from engine start to stop.
(2) For misfiring malfunction, when driving conditions (engine speed, engine coolant temperature,
etc.) are similar to those when the malfunction was first recorded.
4. Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates
the sensor mounted at the position second closest to the engine.
