Car is Jerky and Check Engine Light is On

Causes

• Spark plugs or ignition coils are faulty
• Fuel injector is clogged
• Mass airflow sensor is dirty
• Oxygen sensor is failing
• Catalytic converter is clogged
• Transmission is slipping
• Driveshaft is damaged
• Wheel bearing is failing

Diagnosis

1. Check the spark plugs and ignition coils for any signs of damage or wear.
2. Clean the fuel injector with a fuel injector cleaner.
3. Inspect the mass airflow sensor for any dirt or debris.
4. Test the oxygen sensor with a multimeter.
5. Inspect the catalytic converter for any signs of damage or blockage.
6. Check the transmission fluid level and condition.
7. Inspect the driveshaft for any signs of damage or wear.
8. Check the wheel bearings for any signs of wear or damage.

Repair

• Replace the spark plugs or ignition coils if they are faulty.
• Clean the fuel injector with a fuel injector cleaner.
• Replace the mass airflow sensor if it is dirty.
• Replace the oxygen sensor if it is failing.
• Replace the catalytic converter if it is clogged.
• Repair or replace the transmission if it is slipping.
• Replace the driveshaft if it is damaged.
• Replace the wheel bearing if it is failing.

Prevention

• Regularly maintain your car according to the manufacturer’s recommendations.
• Use high-quality fuel and oil.
• Avoid driving on rough roads.
• Get your car inspected by a qualified mechanic if you notice any unusual symptoms.

Conclusion

If your car is jerky and the check engine light is on, it is important to have it diagnosed and repaired as soon as possible. Ignoring the problem can lead to more serious damage and costly repairs.