Engine Misfire or Mount Issue Causing Whole Car Shake at Idle
A 2019 Nissan Altima that shakes or vibrates throughout the entire car when idling typically points to an engine misfire, worn engine mounts, or a fuel/air delivery problem. The shaking stops or changes when driving, which helps narrow the cause.
Diagnosis Details
Possible Causes
Engine misfire due to faulty spark plugs, ignition coils, or fuel injectors
Worn or broken engine mounts allowing excessive engine movement
Vacuum leak or dirty throttle body causing rough idle
Related OBD-II Codes
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What You Should Do
Check for stored diagnostic trouble codes (DTCs) using an OBD-II scanner.
Inspect spark plugs and ignition coils for wear or damage.
Examine engine mounts for cracks or separation.
Clean throttle body and check for vacuum leaks.
If no codes, perform a fuel pressure test and compression test.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
