Exhaust Gas Recirculation Cooler Bypass Control Circuit Range/Performance

What does P245B mean?

P245B stands for Exhaust Gas Recirculation Cooler Bypass Control Circuit Range/Performance. A part of the emission control system is not working as expected. These codes rarely affect how the car drives, but the car may fail an emissions test.

Powertrain codes cover the engine, transmission and emissions. When the car's computer sees a reading outside its normal range, it stores this code and may turn on a warning light on the dashboard.

Common causes

• Loose or damaged fuel cap (EVAP codes)
• Worn catalytic converter
• Faulty EGR valve or blocked EGR passages
• Faulty oxygen sensor
• Cracked hoses or a leaking purge valve

What to do

1. Read all stored and pending codes with a scanner. Several codes together often point to one cause.
2. Note the freeze frame data (speed, temperature, load) recorded when the code was set.
3. Inspect the wiring and connectors of the part named in the code for damage, corrosion or looseness.
4. Fix the most likely and cheapest cause first, then clear the code and drive to see if it comes back.

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Frequently asked questions

What does P245B mean?

P245B means “Exhaust Gas Recirculation Cooler Bypass Control Circuit Range/Performance”. It belongs to the emission controls group: A part of the emission control system is not working as expected. These codes rarely affect how the car drives, but the car may fail an emissions test.

Is it safe to drive with P245B?

Usually yes in the short term, but get it fixed so the car passes inspection and doesn't waste fuel.

How do I clear P245B?

Fix the cause, then clear the code with an OBD2 scanner or app. If the fault is still there, the code will come back.

Related codes

• P2457Exhaust Gas Recirculation Cooling System Performance
• P2458Diesel Particulate Filter Regeneration Duration
• P2459Diesel Particulate Filter Regeneration Frequency
• P245AExhaust Gas Recirculation Cooler Bypass Control Circuit/Open
• P245CExhaust Gas Recirculation Cooler Bypass Control Circuit Low
• P245DExhaust Gas Recirculation Cooler Bypass Control Circuit High
• P245EDiesel Particulate Filter Pressure Sensor B Circuit
• P245FDiesel Particulate Filter Pressure Sensor B Circuit Range/Performance

Code meanings can vary by manufacturer. This page is general guidance, not a repair manual. Always confirm the cause before replacing parts.