P220E

Reductant Injection Valve Control Circuit High

P220E is a generic OBD-II powertrain diagnostic trouble code: Reductant Injection Valve Control Circuit High. 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
P220E
Group
Powertrain
System
Powertrain
Severity
Warning (MIL on)
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What P220E means

P220E is set when the PCM/ECM detects a higher-than-expected voltage on the control circuit of the reductant (AdBlue/DEF) injection valve. The module monitors the electrical feedback from the injector driver circuit and compares it against calibrated thresholds; a sustained high-voltage condition causes the code to set and the MIL to illuminate.

The reductant injection valve meters precise amounts of urea solution into the exhaust stream upstream of the SCR catalyst. If this valve is stuck open or its circuit faults, the SCR system cannot accurately dose NOx reduction, leading to elevated tailpipe NOx emissions and potential catalyst degradation over time.

Common root causes include a short to voltage in the injector wiring harness, a failed injector driver inside the reductant control module, or an open return path forcing the sense line high. Because the fault is electrical in nature, thorough circuit testing with a wiring diagram should precede any component replacement.

Common causes

Most-frequently reported root causes when P220E is logged.

  • 1
    Short to battery voltage in the reductant injection valve signal or control wire.
  • 2
    Failed or shorted reductant injection valve solenoid winding.
  • 3
    Damaged or chafed wiring harness between the SCR module and the injector.
  • 4
    Faulty reductant control module with an internal driver circuit failure.
  • 5
    Corroded or loose connector at the reductant injector or control module.
  • 6
    Incorrect injector part installed with different electrical characteristics.
  • 7
    Open ground circuit on the injector return path causing the sense line to float high.

Symptoms drivers notice

MIL (check engine light) illuminated.
SCR system disabled or operating in reduced-efficiency mode.
Possible AdBlue/DEF warning lamp on the instrument cluster.
Elevated NOx emissions detectable during testing.
Reductant dosing may cease, reducing catalytic NOx conversion.

How to diagnose P220E

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
    Inspect the reductant injector connector and harness for visible damage, chafing, or corrosion.
  3. 3
    With the key on and engine off, measure voltage on the injector control circuit; a high reading with the circuit de-energized indicates a short to voltage.
  4. 4
    Disconnect the reductant control module and check whether the high voltage condition persists to isolate harness vs. module.
  5. 5
    Measure the resistance of the injector solenoid winding and compare to the service manual specification.
  6. 6
    If wiring and injector test good, suspect an internal fault in the reductant control module and replace per OEM procedure.
  7. 7
    Clear codes, perform a drive cycle, and verify the fault does not return.

Vehicles where we've handled P220E

Platforms in our catalogue with confirmed P220E coverage.

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

Related powertrain codes

Frequently asked questions

Can I drive with P220E active?

Short-term driving is generally possible, but the SCR system will not dose correctly, resulting in high NOx emissions and potential regulatory non-compliance. Repair promptly.

Will P220E cause limp mode?

On most vehicles P220E alone does not trigger engine limp mode, but some manufacturers may impose a torque or speed limitation if SCR faults accumulate.

Is P220E the same as a stuck-open injector?

Not necessarily. P220E is an electrical circuit fault (high voltage). A mechanically stuck-open injector would typically set a different functional code alongside or instead of this circuit code.

How is the reductant injection valve different from a standard fuel injector?

The reductant injector meters aqueous urea (AdBlue/DEF) into the exhaust, not fuel into the cylinder. It operates in a corrosive, high-temperature exhaust environment and is controlled by the SCR module rather than the main ECM.

Disabling P220E in software

RaceTune can permanently disable P220E — 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 P220E 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 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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