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TuningBot DTC Database · v4.37.14

U3003 Diagnostic Trouble Code (3 variants)

Generic (OBD-II) interpretation + 2 manufacturer-specific in the TuningBot DTC database.

U · NetworkBatteryOBD2
Brand pages:FordLand Rover

Generic (OBD-II) interpretation

U3003
Battery Voltage Generic · battery Data confidence 78%

The control module detected a fault associated with the Battery Voltage circuit or function; the stored code identifies the affected component rather than a single failure mode.

Manufacturer-specific interpretations

Ford

3 interpretations
U3003:16
Battery Voltage — Circuit Voltage Below Threshold Ford · steering Data confidence 96%

The Ford Explorer PSCM detected battery voltage with failure type 16, circuit voltage below threshold. This interpretation is specific to the documented EPAS controller and model years.

Recommended checks

  • Perform a full module scan
  • Verify battery voltage and PSCM power supplies
  • Inspect EPAS wiring and connectors
  • Review PSCM snapshot and extended data
  • Follow the Ford EPAS diagnostic procedure
Applies to Ford Explorer 2011-2012 Power Steering Control Module (PSCM)|Electric Power Assisted Steering (EPAS)
U3003:17
Battery Voltage — Circuit Voltage Above Threshold Ford · steering Data confidence 96%

The Ford Explorer PSCM detected battery voltage with failure type 17, circuit voltage above threshold. This interpretation is specific to the documented EPAS controller and model years.

Recommended checks

  • Perform a full module scan
  • Verify battery voltage and PSCM power supplies
  • Inspect EPAS wiring and connectors
  • Review PSCM snapshot and extended data
  • Follow the Ford EPAS diagnostic procedure
Applies to Ford Explorer 2011-2012 Power Steering Control Module (PSCM)|Electric Power Assisted Steering (EPAS)
U3003:68
Battery Voltage — Event Information Ford · steering Data confidence 96%

The Ford Explorer PSCM detected battery voltage with failure type 68, event information. This interpretation is specific to the documented EPAS controller and model years.

Recommended checks

  • Perform a full module scan
  • Verify battery voltage and PSCM power supplies
  • Inspect EPAS wiring and connectors
  • Review PSCM snapshot and extended data
  • Follow the Ford EPAS diagnostic procedure
Applies to Ford Explorer 2011-2012 Power Steering Control Module (PSCM)|Electric Power Assisted Steering (EPAS)

Land Rover

2 interpretations
U3003:16
Battery voltage — Circuit Voltage Below Threshold Land Rover · battery Data confidence 95%

The L405 Deployable Side Step ECU detected battery voltage with failure type 16, circuit voltage below threshold. This interpretation is limited to the documented DSS controller.

Recommended checks

  • Perform a full module scan
  • Verify battery voltage
  • Inspect DSS wiring and connectors
  • Inspect the running-board mechanism for binding
  • Check the Hall-effect sensor signal when applicable
  • Follow the Land Rover DSS troubleshooting guide
Applies to Range Rover L405 2013 model year Deployable Side Step (DSS) ECU
U3003:17
Battery voltage — Circuit Voltage Above Threshold Land Rover · battery Data confidence 95%

The L405 Deployable Side Step ECU detected battery voltage with failure type 17, circuit voltage above threshold. This interpretation is limited to the documented DSS controller.

Recommended checks

  • Perform a full module scan
  • Verify battery voltage
  • Inspect DSS wiring and connectors
  • Inspect the running-board mechanism for binding
  • Check the Hall-effect sensor signal when applicable
  • Follow the Land Rover DSS troubleshooting guide
Applies to Range Rover L405 2013 model year Deployable Side Step (DSS) ECU

Related and nearby codes

U30 range
U3000U3001U3002U3004U3005U3006U3007U3008U3009U300AU300BU300CU300DU300EU300FU3010U3011U3012

How to read U3003

U

Network: communication between control units.

3

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

003

Specific fault index within the subsystem.

Frequently asked questions about U3003

What does U3003 mean?

Diagnostic Trouble Code (3 variants). The control module detected a fault associated with the Battery Voltage circuit or function; the stored code identifies the affected component rather than a single failure mode.

Is U3003 generic or manufacturer-specific?

U3003 exists both as a generic OBD-II code (same meaning on every make) and with 2 manufacturer-specific interpretation(s): Ford, Land Rover. Always read it in the context of your vehicle.

Can TuningBot remove U3003 at file level?

Not guaranteed. Powertrain (P) codes can be reliably disabled in the ECU calibration, but body, chassis and network codes depend on the specific control unit and how the fault is implemented - some can be handled, some cannot. Ask for a quote and our engineers will check your file and tell you, free of charge, whether U3003 is removable in your case.

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