P2C61

Reductant Pump Performance - Flow Too Low

P2C61 is a generic OBD-II powertrain diagnostic trouble code: Reductant Pump Performance - Flow Too Low. It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P2C61
Group
Powertrain
System
Powertrain
Severity
Warning (MIL on, possible limp mode)
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What P2C61 means

P2C61 is stored when the ECM or SCR control module determines that the reductant (DEF/AdBlue) pump is not delivering the commanded flow rate of reducing agent to the injector. The control module compares expected dosing volume against actual measured or inferred delivery and detects a significant shortfall.

Common causes include a clogged DEF filter, a failing reductant pump, frozen or crystallized DEF lines restricting flow, a faulty dosing injector, or low DEF quality. Air in the reductant supply lines can also prevent the pump from developing adequate pressure.

If left unaddressed, the SCR system will be unable to reduce NOx emissions to within legal limits. Many vehicles will enter a derate mode or impose engine torque reduction after a defined number of warm-up cycles without a successful repair, eventually leading to a no-start condition in some markets.

Common causes

Most-frequently reported root causes when P2C61 is logged.

  • 1
    Clogged or restricted DEF (reductant) supply filter.
  • 2
    Failing or worn reductant dosing pump not building adequate pressure.
  • 3
    Frozen or crystallized DEF blocking the supply or return lines.
  • 4
    Faulty or stuck-closed reductant dosing injector.
  • 5
    Air ingestion in the reductant supply circuit after low-DEF run condition.
  • 6
    DEF quality below specification (diluted or contaminated fluid).
  • 7
    Kinked or collapsed reductant supply hose.

Symptoms drivers notice

Malfunction Indicator Lamp (MIL) illuminated.
SCR system warning or DEF system fault message displayed.
Possible engine torque derate after multiple drive cycles.
Elevated NOx emissions detectable at inspection.
DEF consumption lower than expected.

How to diagnose P2C61

A typical diagnostic flow when this code is present.

  1. 1
    Connect a scan tool and record all stored DTCs and freeze-frame data before clearing codes.
  2. 2
    Check DEF fluid level and inspect fluid quality visually for contamination or dilution.
  3. 3
    Inspect DEF supply lines and filter for blockage, kinks, or signs of crystallization.
  4. 4
    Command the reductant pump on with a bi-directional scan tool and verify audible pump operation and pressure build-up.
  5. 5
    Inspect the dosing injector for deposits or damage; perform injector flow test if supported.
  6. 6
    Check for air in the reductant supply system by performing a priming cycle and monitoring for bubbles.
  7. 7
    Replace the DEF filter and retest the system before condemning the pump or injector.

Vehicles where we've handled P2C61

Platforms in our catalogue with confirmed P2C61 coverage.

BMW 530XD
2017
BMW X5
2018–2019
BMW 320D
2016
BMW 530XD 30D

Related powertrain codes

Frequently asked questions

Can I drive with P2C61 active?

Short-term driving is possible, but the vehicle will enter a torque derate cycle if the fault is not repaired within the allowed number of drive cycles. Repair as soon as possible.

Will refilling the DEF tank fix this code?

If the tank was run empty and air entered the lines, refilling and performing a system prime cycle may resolve it. If the filter or pump is faulty, a fluid refill alone will not clear the fault.

How does the ECM know the pump flow is low?

The module compares commanded dosing volume against expected SCR catalyst efficiency and, where fitted, a downstream NOx sensor signal to infer whether adequate reductant is being delivered.

Is P2C61 an emissions-failure code?

Yes. It indicates the SCR system cannot adequately reduce NOx, which is an emissions-related fault. It will cause a failed emissions inspection on vehicles subject to OBD-II testing.

Disabling P2C61 in software

RaceTune can permanently disable P2C61 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

ECUs with a P2C61 disable in our catalogue

Confirmed coverage from our recipe database — we support many more families. Upload your file and our identifier will match it automatically.

  • Bosch EDC17C50 verified 1 software version
  • Bosch EDC17C56 verified 1 software version
  • Bosch MD1CP002 verified 1 software version
  • Bosch MD1CS001 verified 1 software version

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

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