Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Random/multiple cylinder misfire
detected
Toyota Corolla (E120): Random/multiple cylinder misfire detected
Dtc p0300 random/multiple cylinder misfire detected
Dtc p0301 cylinder 1 misfire detected
Dtc p0302 cylinder 2 misfire detected
Dtc p0303 cylinder 3 misfire detected
Dtc p0304 cylinder 4 misfire detected
Other materials:
Inspection procedure
Hint:
perform the troubleshooting of dtc p0335 first. If no trouble is
found, troubleshoot the engine mechanical
systems.
Read freeze frame data using the hand-held tester or the obd ii scan tool.
Freeze frame data records
the engine conditions when a malfunction is detected. When tr ...
Circuit description
The rear heated oxygen sensor is used to monitor oxygen concentration in the
exhaust gas. For optimum
catalytic converter operation, the air fuel mixture must be maintained near the
ideal ”stoichiometric” ratio.
The heated oxygen sensor output voltage changes suddenly in the vicinity of ...
Inspection procedure
1 Check p squib circuit(airbag sensor assy center – instrument
panel passenger airbag assy)
Disconnect the negative (–) terminal cable from the battery,
and wait at least for 90 seconds.
disconnect the connectors between the airbag sensor
assy center and the instrument panel ...