TuningBot DTC Database · v4.37.14
8 manufacturer-specific interpretations across 5 manufacturers in the TuningBot DTC database.
HyundaiThe control module detected a fault associated with the Unused Power Stage C circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Hyundai.
MazdaThe control module detected improper operation of the CAN data bus. This is the manufacturer-specific definition used by Mazda.
PSAThe control module detected that the expected Engine status signal fault was absent. 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.
The control module detected that the expected Engine status signal fault was absent. Documented for the Bosch MEV17.4 engine ECU (EP6 1.6 VTi) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
The control module detected an interruption (open circuit) in the Engine running status information line 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.
The control module detected an interruption (open circuit) in the Engine running information circuit. Documented for the Magneti Marelli MM6KP engine ECU (EW7A/EW10A) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
VAGThe control module detected a short circuit to battery voltage in the AC signal circuit. This is the manufacturer-specific definition used by Audi.
Wiring
VolvoThe control module detected that the Electronic throttle system (ETS), MIL request OFF signal stayed below the expected range. This is the manufacturer-specific definition used by Volvo.
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Diagnostic Trouble Code (8 interpretations). The control module detected a fault associated with the Unused Power Stage C circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Hyundai.
P1657 is a manufacturer-specific code. In this database it is documented for: Hyundai, Mazda, PSA, VAG, Volvo. The same number can mean something different on other brands.
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Understand the system behind this code: Diagnostic Strategy and DTC Logic
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