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TuningBot DTC Database · v4.37.15

P2ACE Reductant Temperature Sensor B Circuit Low

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

P · PowertrainEmissionsOBD2

What P2ACE means

P2ACE
Reductant Temperature Sensor B Circuit Low Generic · emissions Data confidence 65%

The control module detected that the signal in the Reductant Temperature Sensor B circuit stayed below the expected operating range.

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

Related codes
P2ACCP2ACDP2ACF
P2A range
P2A00P2A01P2A02P2A03P2A04P2A05P2A06P2A07P2A08P2A09P2A0AP2A0BP2A0CP2A0DP2A0EP2A0FP2A10P2A11

How to read P2ACE

P

Powertrain: engine, transmission and driveline systems.

2

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

ACE

Specific fault index within the subsystem.

Frequently asked questions about P2ACE

What does P2ACE mean?

Reductant Temperature Sensor B Circuit Low. The control module detected that the signal in the Reductant Temperature Sensor B circuit stayed below the expected operating range.

Is P2ACE generic or manufacturer-specific?

P2ACE is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P2ACE at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. 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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