9-150
P0300, P0301, P0302, P0303
4. Check the ignition system
5. Check the following parts. If defective, replace the parts and go to step 6.
• Intake air pressure sensor
• Coolant temperature sensor (or Engine temperature sensor)
• Speed sensor
• Crankshaft position sensor
• Throttle position sensor
• Gear position sensor
6. Perform a reproduction test and connect the YDT.
Check that the pending DTC is not detected, then complete the troubleshooting.
Is the inspection result OK?
Yes
→ Go to step 5.
No
→Repair or replace the defective part, then go to step 6.
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