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TuningBot DTC Database · v4.37.15

P26BD Diagnostic Trouble Code (2 variants)

Generic (OBD-II) interpretation + 1 manufacturer-specific in the TuningBot DTC database.

P · PowertrainEngineOBD2
Brand pages:Ford

Generic (OBD-II) interpretation

P26BD
Engine Coolant Bypass Valve D Control Circuit/Open Generic · engine Data confidence 65%

The control module detected an interruption (open circuit) in the Engine Coolant Bypass Valve D Control circuit, so the expected electrical continuity was not present.

Manufacturer-specific interpretations

Ford

2 interpretations
P26BD:12
Engine Coolant Bypass Valve "D" Control Circuit Short to Battery Ford · engine Data confidence 94%

Ford documents P26BD:12 (circuit short to battery) for its 2024-2025 gasoline-engine OBD monitor strategy as engine coolant bypass valve "d" control circuit short to battery. This three-byte interpretation is application-specific and identifies the detected monitor condition rather than a confirmed failed component.

Recommended checks

  • Perform a full module scan
  • Review freeze-frame and occurrence data
  • Inspect relevant wiring and connectors
  • Check power supplies and grounds
  • Check applicable OEM service information
Applies to Ford gasoline-engine OBD applications|2024-2025 model years
P26BD:13
Engine Coolant Bypass Valve "D" Control Circuit Ford · engine Data confidence 94%

Ford documents P26BD:13 (circuit open) for its 2024-2025 gasoline-engine OBD monitor strategy as engine coolant bypass valve "d" control circuit. This three-byte interpretation is application-specific and identifies the detected monitor condition rather than a confirmed failed component.

Recommended checks

  • Perform a full module scan
  • Review freeze-frame and occurrence data
  • Inspect relevant wiring and connectors
  • Check power supplies and grounds
  • Compare commanded and measured values
  • Check applicable OEM service information
Applies to Ford gasoline-engine OBD applications|2024-2025 model years

Related and nearby codes

How to read P26BD

P

Powertrain: engine, transmission and driveline systems.

2

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

6BD

Specific fault index within the subsystem.

Frequently asked questions about P26BD

What does P26BD mean?

Diagnostic Trouble Code (2 variants). The control module detected an interruption (open circuit) in the Engine Coolant Bypass Valve D Control circuit, so the expected electrical continuity was not present.

Is P26BD generic or manufacturer-specific?

P26BD exists both as a generic OBD-II code (same meaning on every make) and with 1 manufacturer-specific interpretation(s): Ford. Always read it in the context of your vehicle.

Can TuningBot remove P26BD 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

ECU tuningStage 1 dyno results for Ford engines See the results →

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