High pressure fuel regulation : Measured rail pressure higher than the maximum pressure
PSA · fuel
Data confidence72%
The control module detected the fault condition "Measured rail pressure higher than the maximum pressure" for the High pressure fuel regulation. Documented for the Bosch EDC16C34 injection ECU (DV6TED4 1.6 HDi) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Fuel circuit : Rail pressure too high
PSA · fuel
Data confidence72%
The control module detected that the Fuel circuit was above its expected limit. Documented for the Bosch MED 17.4.x engine ECU (EP6 THP family) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Applies toPeugeotBosch MED 17.4.x engine ECU (EP6 THP family)
P1166
Fuel circuit : Maximum rail pressure exceeded
PSA · fuel
Data confidence72%
The control module detected the fault condition "Maximum rail pressure exceeded" for the Fuel circuit. Documented for the Continental SID 807 injection ECU (DV6C 1.6 HDi) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Fuel system : Maximum rail pressure exceeded
PSA · fuel
Data confidence72%
The control module detected the fault condition "Maximum rail pressure exceeded" for the Fuel system. Documented for the Delphi DCM 3.5 injection ECU (DW10C 2.0 HDi) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Powertrain: engine, transmission and driveline systems.
1
Manufacturer-defined range: the meaning can differ between brands.
166
Specific fault index within the subsystem.
Frequently asked questions about P1166
What does P1166 mean?
Diagnostic Trouble Code (4 interpretations). The control module detected the fault condition "Measured rail pressure higher than the maximum pressure" for the High pressure fuel regulation. Documented for the Bosch EDC16C34 injection ECU (DV6TED4 1.6 HDi) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Is P1166 generic or manufacturer-specific?
P1166 is a manufacturer-specific code. In this database it is documented for: PSA. The same number can mean something different on other brands.
Can TuningBot remove P1166 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.
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