P244C

Exhaust Gas Recirculation Cooler Bypass Control Circuit Low

P244C is a generic OBD-II powertrain diagnostic trouble code: Exhaust Gas Recirculation Cooler Bypass Control Circuit 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
P244C
Group
Powertrain
System
Powertrain
Severity
Warning (MIL on)
Need P244C disabled?
RaceTune permanently disables any OBD-II trouble code on supported ECUs — for motorsport, off-road, and export use.
→

What P244C means

P244C is stored when the PCM/ECM detects that the signal voltage on the EGR cooler bypass control circuit is lower than the expected range. The EGR cooler bypass valve diverts exhaust gas around the cooler during cold starts to accelerate engine warm-up and reduce emissions during the warm-up phase.

When the control circuit voltage falls below the calibrated threshold, the ECM cannot confirm proper valve actuation. This may result in the EGR system operating outside its intended thermal management strategy, potentially affecting NOx output and fuel economy. The fault is typically electrical in nature, pointing to a short to ground, open circuit, or a failed solenoid driver.

Diagnosis should begin with a thorough inspection of the wiring harness and connector at the bypass solenoid before condemning any components. A wiring diagram is essential to trace the circuit back to the PCM and identify any shared grounds or splice points that may be involved.

Common causes

Most-frequently reported root causes when P244C is logged.

  • 1
    Short to ground in the EGR cooler bypass solenoid control wire.
  • 2
    Open circuit or broken wire in the bypass valve control harness.
  • 3
    Corroded or damaged connector at the EGR cooler bypass solenoid.
  • 4
    Failed EGR cooler bypass solenoid (internal short or open coil).
  • 5
    PCM driver circuit fault causing inability to supply proper voltage.
  • 6
    Chafed wiring contacting the vehicle chassis or exhaust components.

Symptoms drivers notice

MIL (check engine light) illuminated.
Possible increase in NOx emissions during cold start.
Engine may take longer than normal to reach operating temperature.
Potential reduction in fuel economy during warm-up cycles.
No drivability concerns typically noted under normal operating conditions.

How to diagnose P244C

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 EGR cooler bypass solenoid connector and harness for corrosion, damage, or loose pins.
  3. 3
    Measure the resistance of the bypass solenoid coil and compare to specification.
  4. 4
    Check the control circuit wire for continuity and verify no short to ground exists.
  5. 5
    Verify reference voltage and ground supply at the solenoid connector with key-on.
  6. 6
    Command the bypass valve on and off with a scan tool and observe voltage response.
  7. 7
    Replace the EGR cooler bypass solenoid if the circuit checks pass and the solenoid does not respond.

Vehicles where we've handled P244C

Platforms in our catalogue with confirmed P244C coverage.

AUDI A4 20D
BMW 320D
2016

Related powertrain codes

Frequently asked questions

Can I drive with P244C active?

Yes, in most cases the vehicle remains driveable, but the MIL will be on and emissions compliance may be affected. Have it diagnosed promptly.

Is P244C the same as an EGR valve fault?

No. P244C specifically targets the cooler bypass valve circuit, not the main EGR valve itself, though both are part of the EGR system.

Will clearing the code fix the problem?

No. The code will return if the underlying electrical fault is not repaired. Clearing it only resets the MIL temporarily.

Can a bad PCM cause P244C?

It is possible but uncommon. Always rule out wiring and solenoid faults before suspecting the PCM.

Disabling P244C in software

RaceTune can permanently disable P244C — 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 P244C 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 EDC17C74 verified 1 software version
  • Bosch EDC17CP09 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.

Got P244C in your scan?

Upload your ECU file — we'll identify the exact software version and confirm whether a disable is available for your car.

Upload your file