Is it safe to drive with a P0303 code?

Severity is high. Address P0303 sooner rather than later — driving with an active check engine light can worsen the problem or void emissions warranties.

How much does it cost to fix P0303?

Repair costs for P0303 typically range from $40 to $800 in the US, depending on the underlying cause. The most common fix is: Coil.

What are the symptoms of P0303?

CEL. Rough idle. Loss of power.

Check Engine Code

P0303

Cylinder 3 Misfire Detected

Severity: high DIY difficulty: 2/5 Typical cost: $40–$800

What P0303 means

Same misfire diagnosis, isolated to cylinder #3.

Symptoms

CEL
Rough idle
Loss of power

Likely causes (most common first)

Coil
Plug
Injector
Compression

Can I keep driving?

High — risk of damage if ignored

Typical repair cost

DIY fixes can start near $40 (parts only). Shop repairs for P0303 typically run up to $800 depending on the underlying cause and vehicle. Start with the most common cause — Coil — before throwing parts at it.

Related codes

P0300 P0301 P0302 P0304

Confirm P0303 yourself in 60 seconds

AXLY.pro is a free iPhone app that pairs with any Bluetooth OBD2 adapter to read P0303 and every other stored code, plus live engine data. No subscription.

Download AXLY.pro Free Browse all codes