Safety Note
Coolant Leak
Monitor temperature gauge. Do not drive if overheating.
Based on owner reports. Always prioritize safety and consult a qualified mechanic.
Back to P0303 Overview
How to Diagnose P0303
13 owner reports7 diagnostic steps
DIY Diagnostic Checklist
Based on 13 owner reports
Progress0%
Step 1check: coolant levels
Step 2check: cylinder 3 for coolant leaking into cylinder
Step 3check: engine had gone away
Step 4check: engine light code p0303 (cylinder 3 misfire)
Step 5check: engine light is on
Step 6check: oil for coolant
Step 7verify: engine
Root Causesfor P0303
Based on 13 owner reports
Confirmed Causes
- 1yet. we have replaced spark plugs(8% of cases)spark-plugs
What Didn't Help
Repairs that owners tried but didn't fix the issue
being able to trust the vehiclecar person at all so would really appreciate some helpget ripped offresolved yettaking any action for resolving the issue
Things to Check
Suggested areas to investigate based on similar cases
coolant levelscylinder 3 for coolant leaking into cylinderengine had gone awayengine light code p0303 (cylinder 3 misfire)engine light is onoil for coolant