P200F: Catalyst System Over Temperature (Bank 2)

P200F flags excessive temperature in the catalyst of bank 2, so it needs an engine whose second bank feeds its own catalyst with its own temperature sensor. No manufacturer documents P200F publicly; GM and Ford describe only the bank 1 code P200E for their single-path diesels, with limits around 800 to 850 °C behind the oxidation catalyst or a link to a stationary regeneration that runs hot. A twin-path system would apply such a limit per side. Overheating confined to one bank usually has a cause on that bank: an injector dribbling fuel, misfire on those cylinders, or a sensor reading too high. Comparing both banks helps: if only bank 2 is hot, look at its cylinders and sensor first. CARB treats such temperature records as protection, not as proof that the catalyst still converts, so efficiency is monitored separately.

Bank 2 is the side without cylinder 1, so it only exists on V or boxer engines.

Symptoms

• Malfunction indicator lamp on
• Possible power reduction

Most likely causes

• Fuel slipping into the bank 2 exhaust (dribbling injector, misfire)
• Bank 2 exhaust temperature sensor reading too high
• Regeneration overheating on bank 2

What to check, in order

Start with the simplest. You can tick off each step.

1. First resolve any misfire or fuel mixture codes
2. Look for exhaust leaks between the engine and the second sensor
3. Use live data to compare the signals from both oxygen sensors
4. Check for a blockage by measuring exhaust back pressure
5. Replace the catalytic converter only at the end of the diagnosis

Good to know

• Repair difficulty: hard
• It can trigger limp mode.
• It affects emissions.

What each character of P200F means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 0: Subsystem depends on the code range
• 0F: Specific fault in that system

Frequently asked questions

Can I keep driving with code P200F?

You can usually keep driving, unless you notice a loss of power, which may point to a blockage. The car may not pass an emissions inspection.

What causes code P200F?

The most common causes are: fuel slipping into the bank 2 exhaust (dribbling injector, misfire); bank 2 exhaust temperature sensor reading too high; regeneration overheating on bank 2.

Related codes

• P200ECatalyst System Over Temperature (Bank 1)
• P200DParticulate Filter Over Temperature (Bank 2)
• P2429Exhaust Gas Temperature Too High (Bank 2)
• P2082Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 2 Sensor 1)

Sources

• law.cornell.edu: 13 CCR 1968.2
• gsi.ext.gm.com: 25OBDG04A
• fordservicecontent.com: obd summary diesel 2023

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.