P2737

Control SolenoidFControl Circuit Range/Performance

P2737 is a generic OBD-II powertrain diagnostic trouble code: Control SolenoidFControl Circuit Range/Performance. 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
P2737
Group
Powertrain
System
Powertrain
Severity
Warning (MIL on, possible limp mode)
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What P2737 means

P2737 is set when the transmission control module (TCM) detects a lower-than-expected voltage or current on the control circuit of pressure control solenoid F. This solenoid is responsible for regulating hydraulic pressure within a specific circuit of the automatic transmission, and its correct operation is essential for proper gear selection and clutch apply pressure.

When the TCM commands the solenoid and the measured circuit response falls below the calibrated threshold, it logs P2737 and may substitute default hydraulic pressures or lock the transmission in a safe gear. Continued operation in this condition can accelerate clutch and band wear due to uncontrolled slip.

Common causes include wiring harness damage between the TCM and the valve body connector, corrosion at the transmission external connector, an internally shorted solenoid winding, or a faulty TCM output driver. Diagnosis should begin with a thorough inspection of the transmission wiring harness and connector integrity before any component replacement.

Common causes

Most-frequently reported root causes when P2737 is logged.

  • 1
    Short to ground in the wiring harness between the TCM and pressure control solenoid F.
  • 2
    Corroded or damaged transmission external wiring harness connector pins.
  • 3
    Internally shorted pressure control solenoid F winding.
  • 4
    Open circuit or high resistance in the solenoid power supply wire.
  • 5
    Faulty TCM with a failed solenoid driver output.
  • 6
    Transmission fluid contamination causing solenoid sticking and abnormal current draw.
  • 7
    Damaged valve body solenoid bore causing solenoid housing short.

Symptoms drivers notice

Malfunction Indicator Lamp (MIL) illuminated.
Transmission shifting harshly or erratically between gears.
Transmission locked in a single gear (limp-home mode).
Delayed or no engagement when selecting drive or reverse.
Abnormal transmission fluid temperature increase.

How to diagnose P2737

A typical diagnostic flow when this code is present.

  1. 1
    Connect a scan tool and record all stored DTCs and freeze frame data.
  2. 2
    Inspect the transmission external wiring harness and connector for corrosion, bent pins, or chafing damage.
  3. 3
    Measure the resistance of pressure control solenoid F at the transmission connector and compare to specification.
  4. 4
    Check for short to ground on the solenoid control wire using a digital multimeter with the TCM connector unplugged.
  5. 5
    Monitor solenoid F control circuit current with a scan tool PID while commanding the solenoid on and off.
  6. 6
    If wiring and solenoid resistance are within spec, perform a TCM power and ground integrity check before suspecting TCM failure.
  7. 7
    Replace the solenoid or TCM only after all wiring faults have been ruled out.

Vehicles where we've handled P2737

Platforms in our catalogue with confirmed P2737 coverage.

BMW 320D
2016

Related powertrain codes

Frequently asked questions

Can I drive with P2737 active?

Short-term driving to a repair facility is possible if the vehicle is not in limp mode, but continued driving risks transmission damage from unregulated hydraulic pressure.

Does P2737 always mean the solenoid is bad?

No. A wiring or connector fault is equally or more likely. Always inspect the harness and measure circuit resistance before replacing the solenoid.

Will clearing the code fix the problem?

No. Clearing the code without repair will only cause it to return once the TCM re-runs its diagnostic monitor.

Is pressure control solenoid F the same on all transmissions?

No. The designation F refers to a specific solenoid position within a given transmission family; the exact location varies by manufacturer and model.

Disabling P2737 in software

RaceTune can permanently disable P2737 — 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 P2737 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

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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