If your car feels sluggish, struggles to accelerate, or lacks power when driving uphill or overtaking, it’s a sign that the engine isn’t producing enough power. This can be caused by issues in the fuel system, air intake, ignition, or exhaust. Loss of power makes driving frustrating and, in some cases, unsafe.

What does it mean if a car is not getting enough power?

A lack of power means the engine isn’t able to deliver normal performance. The problem could be restricted airflow, insufficient fuel delivery, weak ignition, or exhaust blockages that prevent the engine from running efficiently.

Common causes of power loss

• Dirty or clogged air filter
• Blocked fuel filter or failing fuel pump
• Dirty or leaking fuel injectors
• Worn or fouled spark plugs and ignition coils
• Exhaust restrictions, such as a blocked catalytic converter
• Faulty sensors (oxygen sensor, mass airflow sensor, throttle position sensor)
• Transmission issues preventing proper power transfer

Why do you need to fix this problem quickly?

Driving with reduced power can put you at risk when overtaking or merging into traffic. It may also cause higher fuel consumption, increased emissions, and long-term damage to the engine or transmission if left unresolved.

How do you know when to get it checked?

Signs include:

• Slow or weak acceleration
• Car struggles when going uphill or carrying loads
• Check Engine Light illuminated
• Unusual engine noises such as misfiring or knocking
• Excessive exhaust smoke

What happens during an assessment?

A mechanic will:

1. Scan the ECU for fault codes
2. Inspect the air filter, intake system, and throttle body
3. Check fuel pressure, fuel pump, and injectors
4. Inspect spark plugs, ignition coils, and timing
5. Test the catalytic converter and exhaust system for blockages
6. Check the transmission and driveline if engine performance is normal but power isn’t reaching the wheels

How much does it cost to fix?

Costs depend on the cause. Air or fuel filter replacement may cost $100–$250. Spark plugs and ignition repairs typically cost $200–$500. Fuel pump or catalytic converter replacements can range from $600–$1,800+.

Is it unsafe to drive with reduced power?

Yes. A car that lacks power may struggle to accelerate into traffic or uphill, which can be dangerous. It should be inspected promptly to restore safe performance.