P20F3

DTC P20F3, sometimes indicated as P20F300 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing scr nox pre- catalyst efficiency below threshold bank 2.

This code is caused by the NOx pre-catalyst efficiency below threshold for Bank 2. This may be due to a defective NOx pre-catalyst, or a restriction in the exhaust system upstream of the pre-catalyst.
To fix this issue, you will need to determine the root cause of the problem and address it. If the issue is a defective pre-catalyst, then you will need to replace it. If the issue is a restriction in the exhaust system, then you will need to remove the obstruction.

• P20F3: SCR NOx Pre- Catalyst Efficiency Below Threshold Bank 2
• P20F3: SCR NOx Pre- Catalyst Efficiency Below Threshold
• P20F3: Nitrogen oxide (NOx) sensor, pre-catalyst, bank 2 – efficiency below threshold
• P20F3 00: Nitrogen oxide (NOx) sensor, pre-catalyst, bank 2 - efficiency below threshold