Power Source CircuitCatalyst System Efficiency Below Threshold (Bank 1) (P0420)
MONITOR DESCRIPTION
The ECM uses sensors mounted in front of and behind the Three-Way Catalytic Converter
(TWC) to monitor its efficiency.
The first sensor, the air fuel ratio sensor, sends pre-catalyst information to
the ECM. The second sensor, the heat ...
Removal
REMOVAL
PROCEDURE
1. PRECAUTION
CAUTION:
Be sure to read Precaution thoroughly before servicing (See page
).
If the front seat side airbag assembly was deployed, replace the front
seat side airbag assembly, front seat frame assembly wit ...
Engine Coolant Temperature Circuit Malfunction (P0115,P0117,P0118)
DESCRIPTION
A thermistor, whose resistance value varies according to the engine coolant temperature,
is built into the engine coolant temperature sensor.
The structure of the sensor and its connection to the ECM are similar to those
of the intake air tem ...