Can I drive with P0312?

Flashing light? Stop driving now. Steady light? Drive gently to a mechanic soon. If the check engine light is steady, drive gently to a mechanic soon. If the check engine light is FLASHING, stop driving. Unburned fuel can destroy the catalytic converter.

What does P0312 mean?

P0312 stands for Cylinder 12 Misfire Detected.

Symptoms you may notice

• Engine shaking or stumbling under acceleration
• Noticeable power loss and sluggish response
• Flashing or steady check engine light
• Strong fuel odor from the exhaust pipe

How much does it cost to fix?

Repair costs for code P0312 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:

• Failed ignition coil on cylinder 12
  $50-$160 common
• Fouled spark plug in cylinder 12
  $20-$80 common
• Clogged fuel injector for cylinder 12
  $120-$320 possible
• Low compression on valve seat
  $700-$2500 rare

What to do next

1. Observe your check engine light: if it is FLASHING, stop driving now to avoid catalytic converter damage.
2. If the check engine light is STEADY, drive gently to a mechanic soon without hard acceleration or towing.
3. Inspect the spark plugs, ignition coils, and fuel injector connectors for faults.

Related codes

About this code

Code P0312 occurs on V10 or V12 engines when cylinder 12 misfires. Raw fuel entering the exhaust will cause severe catalytic converter degradation. Follow the flashing light rule immediately.