What Does P1314 Mean?
P1314 indicates that the misfire rate on Bank 2 cylinders has reached a level sufficient to cause catalytic converter damage. This is the Bank 2 counterpart to P1313 and represents a critical thermal threat to the catalyst. The ECM may flash the MIL and invoke power-reduction strategies to limit further damage.
Safety Warning
This code warns of imminent catalytic converter damage from excessive misfires. The catalyst can overheat to glowing temperatures, risking underbody fire and total converter failure. Cease driving and repair immediately.
Common Causes
30%
Worn or fouled spark plugs on Bank 2 cylinders
25%
Failing ignition coils on Bank 2
20%
Fuel injector malfunction (clogged or leaking) on Bank 2
15%
Vacuum leak affecting Bank 2 cylinders
10%
Low compression on one or more Bank 2 cylinders
Diagnostic Steps
1
Check for companion misfire codes (P0302, P0304, P0306) to identify which specific Bank 2 cylinders are misfiring.
2
Remove and inspect spark plugs on Bank 2 — look for oil fouling, carbon deposits, or electrode erosion.
3
Swap ignition coils between Bank 2 and Bank 1 cylinders to isolate a failing coil.
4
Verify fuel injector operation on all Bank 2 cylinders using a noid light or bi-directional scan tool test.
5
Perform a smoke test around the Bank 2 intake runners to check for vacuum leaks.
6
If ignition and fuel systems check out, run a compression test on all Bank 2 cylinders.
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
P1314 indicates that the misfire rate on Bank 2 cylinders has reached a level sufficient to cause catalytic converter damage. This is the Bank 2 counterpart to P1313 and represents a critical thermal threat to the catalyst. The ECM may flash the MIL and invoke power-reduction strategies to limit fur...
The most common cause of P1314 (Misfire Rate Catalyst Damage Fault - Bank 2) is: Worn or fouled spark plugs on Bank 2 cylinders
Typical repair costs for P1314 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code warns of imminent catalytic converter damage from excessive misfires. The catalyst can overheat to glowing temperatures, risking underbody fire and total converter failure. Cease driving and repair immediately.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1314 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition / Fuel / Catalyst Protection
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