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TuningBot DTC Database · v4.37.14

P20F1 SCR NOx Pre - Catalyst - Over Temperature Bank 2

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainEmissionsOBD2

What P20F1 means

P20F1
SCR NOx Pre - Catalyst - Over Temperature Bank 2 Generic · emissions Data confidence 85%

The control module detected that the SCR NOx Pre - Catalyst temperature exceeded its permissible limit.

Symptoms

  • MIL or SCR/AdBlue warning illuminated
  • Possible start-count-down or torque limitation on some applications

Possible causes

  • Reductant quality or level fault
  • Dosing valve or supply module fault
  • NOx sensor fault
  • Frozen or crystallized reductant lines
  • Wiring or connector fault

Recommended checks

  • Read NOx sensor values and dosing system status
  • Check reductant level and quality data
  • Inspect dosing valve, lines and heater operation
  • Check wiring and connectors of the SCR components
  • Check for OEM technical bulletins and software updates

Related and nearby codes

P20 range
P2000P2001P2002P2003P2004P2005P2006P2007P2008P2009P200AP200BP200CP200DP200EP200FP2010P2011

How to read P20F1

P

Powertrain: engine, transmission and driveline systems.

2

Generic SAE-standard code: same meaning on every make.

0F1

Specific fault index within the subsystem.

Frequently asked questions about P20F1

What does P20F1 mean?

SCR NOx Pre - Catalyst - Over Temperature Bank 2. The control module detected that the SCR NOx Pre - Catalyst temperature exceeded its permissible limit.

Is P20F1 generic or manufacturer-specific?

P20F1 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P20F1 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

Stage 1/2/3 TuningDPF RemovalEGR RemovalAdBlue / SCR RemovalDTC RemovalIMMO OFFSpeed Limiter (Vmax)

Understand the system behind this code: SCR / AdBlue System

ECU tuningDyno-tested results by model and engine See the results →

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