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TuningBot DTC Database · v4.37.15

P1266 Diagnostic Trouble Code (5 interpretations)

5 manufacturer-specific interpretations across 4 manufacturers in the TuningBot DTC database.

P · PowertrainEngineOBD2
Brand pages:FordJeepMazdaVAG

Ford

1 interpretation
P1266
Cylinder #6 High To Low Side Short Ford · engine Data confidence 80%

The control module detected a fault associated with the Cylinder #6 High To Low Side Short circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Ford.

Possible causes

Wiring short circuit

Jeep

1 interpretation
P1266
Glow Plug #4 Circuit Jeep · ignition Data confidence 62%

The control module detected improper operation of the Glow Plug #4 circuit. This is the manufacturer-specific definition used by Jeep.

Mazda

1 interpretation
P1266
Cylinder #6 High To Low Side Short Mazda · engine Data confidence 62%

The control module detected a fault associated with the Cylinder #6 High To Low Side Short circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Mazda.

VAG

2 interpretations
P1266
Injector 3 - implausible signal VAG · fuel Data confidence 62%

The control module judged the Injector 3 signal implausible when compared with other operating data. This is the manufacturer-specific definition used by Audi.

Possible causes

No control

Applies to Audi
P1266
PD Unit Injector: Cylinder 3 (N242): Implausible Signal VAG · fuel Data confidence 80%

The control module judged the PD Unit Injector: Cylinder 3 (N242) signal implausible when compared with other operating data. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 17673. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).

Symptoms

  • Malfunction Indicator Light (MIL) ON
  • Reduced Power Output

Possible causes

  • Wiring and/or Connector(s) from/to PD Unit Injector: Cylinder 3 (N242) faulty
  • PD Unit Injector: Cylinder 3 (N242) faulty
  • Camshaft worn out / faulty

Recommended checks

  • Check Wiring and/or Connector(s) from/to PD Unit Injector: Cylinder 3 (N242)
  • Check/Replace PD Unit Injector: Cylinder 3 (N242)
  • Check Camshaft for Signs of wear
Applies to Volkswagen

Related and nearby codes

P12 range
P1200P1201P1202P1203P1204P1205P1206P1207P1208P1209P120AP120CP1210P1211P1212P1213P1214P1215

How to read P1266

P

Powertrain: engine, transmission and driveline systems.

1

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

266

Specific fault index within the subsystem.

Frequently asked questions about P1266

What does P1266 mean?

Diagnostic Trouble Code (5 interpretations). The control module detected a fault associated with the Cylinder #6 High To Low Side Short circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Ford.

Is P1266 generic or manufacturer-specific?

P1266 is a manufacturer-specific code. In this database it is documented for: Ford, Jeep, Mazda, VAG. The same number can mean something different on other brands.

Can TuningBot remove P1266 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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