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TuningBot DTC Database · v4.37.15

P1766 Diagnostic Trouble Code (5 interpretations)

5 manufacturer-specific interpretations across 5 manufacturers in the TuningBot DTC database.

P · PowertrainTransmissionOBD2
Brand pages:FordLand RoverMazdaPSAVAG

Ford

1 interpretation
P1766
Shift Solenoid 'D' Performance Ford · transmission Data confidence 80%

The control module judged the Shift Solenoid 'D' behaviour implausible for the current operating conditions. This is the manufacturer-specific definition used by Ford.

Land Rover

1 interpretation
P1766
Coast clutch solenoid (CCS) - defective Land Rover · transmission Data confidence 62%

The control module's internal test reported the Coast clutch solenoid (CCS) as faulty. This is the manufacturer-specific definition used by Land Rover.

Possible causes

  • Wiring
  • CCS
  • ECMfTCM

Mazda

1 interpretation
P1766
Shift Solenoid 'D' Performance Mazda · transmission Data confidence 62%

The control module judged the Shift Solenoid 'D' behaviour implausible for the current operating conditions. This is the manufacturer-specific definition used by Mazda.

PSA

1 interpretation
P1766
Gear selection electrovalve output fault : Open circuit PSA · engine Data confidence 72%

The control module detected an interruption (open circuit) in the Gear selection electrovalve output fault circuit. Documented for the MCP 6-speed piloted manual gearbox ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models.

Applies to Peugeot MCP 6-speed piloted manual gearbox ECU

VAG

1 interpretation
P1766
Throttle Angle Signal Stuck Off VAG · engine Data confidence 62%

The control module determined that the Throttle Angle did not change state as commanded and appears stuck. This is the manufacturer-specific definition used by Volkswagen.

Applies to Volkswagen

Related and nearby codes

P17 range
P1700P1701P1702P1703P1704P1705P1706P1707P1708P1709P170AP1710P1711P1712P1713P1714P1715P1716

How to read P1766

P

Powertrain: engine, transmission and driveline systems.

1

Manufacturer-defined range: the meaning can differ between brands.

766

Specific fault index within the subsystem.

Frequently asked questions about P1766

What does P1766 mean?

Diagnostic Trouble Code (5 interpretations). The control module judged the Shift Solenoid 'D' behaviour implausible for the current operating conditions. This is the manufacturer-specific definition used by Ford.

Is P1766 generic or manufacturer-specific?

P1766 is a manufacturer-specific code. In this database it is documented for: Ford, Land Rover, Mazda, PSA, VAG. The same number can mean something different on other brands.

Can TuningBot remove P1766 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

Stage 1/2/3 TuningDPF RemovalEGR RemovalAdBlue / SCR RemovalDTC RemovalIMMO OFFSpeed Limiter (Vmax)

Understand the system behind this code: Diagnostic Strategy and DTC Logic

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