Car Codes diagnostic trouble code
Battery VoltageDiagnostic contextPotentially applicable to OBD-II-compliant vehicles; confirm against vehicle VIN, model year and module.Vehicle applicabilityApplicability varies by vehicle, powertrain, model year and control module.
Code interpretation
What U3003 means
This code indicates Battery Voltage Its precise meaning depends on the reporting control module, complete failure-type suffix, model year, powertrain and software level.
Driver experience
Symptoms you may notice
A stored diagnostic trouble code or related system symptom.
Test, do not guess
Possible causes
Confirm the reporting module, circuit condition, power supply, wiring, component performance and software status.
Evidence-led checks
Recommended diagnostic route
Save the complete scan, confirm the full code and reporting module, then test using model-specific multi-brand technical information.
- Capture the evidenceSave the complete all-module scan, code suffixes and freeze-frame data.
- Prove the basicsTest battery condition, system voltage, power and grounds.
- Identify the reporterConfirm the module that logged the code and check circuit integrity.
- Compare live dataReview commanded and actual values under the conditions that set the code.
- Test before replacingUse model-specific wiring diagrams, pin tests and technical information.
- Verify the repairClear the code only after recording evidence, then confirm it does not return.
Vehicle fitment
Vehicle applicability
Mazda CX-5, Ford Mustang Mach-E, Ford Explorer
Before clearing
Can the code be cleared?
Clearing a code without fixing the cause removes useful evidence and may only switch the warning off temporarily. Save the full scan first; a permanent or repeatedly returning code needs testing.
Confirm the suffix, reporting module, model, year, engine and live data before replacing a component.
Verified public evidence
Manufacturer and model coverage
16 public manufacturer records match this search. These records support applicability research but do not replace VIN-specific workshop information.
EXPLORER · 2025 · Multiple/unspecified
…2025-2026 Explorer/Aviator vehicles may exhibit a no crank/no start/discharged battery condition with diagnostic trouble codes (DTC) B144D:29, B144E:29, B1555:29, B1556:29 and/or U3003:16 stored in the rear gate trunk module (RGTM).…
SourceEXPLORER · 2026 · Multiple/unspecified
…2025-2026 Explorer/Aviator vehicles may exhibit a no crank/no start/discharged battery condition with diagnostic trouble codes (DTC) B144D:29, B144E:29, B1555:29, B1556:29 and/or U3003:16 stored in the rear gate trunk module (RGTM).…
SourceEXPLORER · 2020 · Powertrain
…12-volt circuit. These DTCs will often occur at vehicle key-on and may be difficult to reproduce. Before replacement of the SOBDMC or SOBDMB, diagnose any low voltage DTCs (P0562, U3003)…
SourceEXPLORER · 2021 · Powertrain
…12-volt circuit. These DTCs will often occur at vehicle key-on and may be difficult to reproduce. Before replacement of the SOBDMC or SOBDMB, diagnose any low voltage DTCs (P0562, U3003)…
SourceMUSTANG MACH E · 2021 · Powertrain
…12-volt circuit. These DTCs will often occur at vehicle key-on and may be difficult to reproduce. Before replacement of the SOBDMC or SOBDMB, diagnose any low voltage DTCs (P0562, U3003)…
SourceRANGE ROVER · 2013 · Multiple/unspecified
…PANIED BY: -U0001-87 / 88 HIGH SPEED CAN BUS INVALID SERIAL DATA RECEIVED / MISSING MESSAGE. CHCM DTCS LOGGED: -U0131-00 CHASSIS CONTROL MODULE (CHCM) LOST COMMS WITH PSCM. -U3003-62 BATTERY…
SourceRANGE ROVER · 2013 · Multiple/unspecified
…PANIED BY: -U0001-87 / 88 HIGH SPEED CAN BUS INVALID SERIAL DATA RECEIVED / MISSING MESSAGE. CHCM DTCS LOGGED: -U0131-00 CHASSIS CONTROL MODULE (CHCM) LOST COMMS WITH PSCM. -U3003-62 BATTERY…
SourceRANGE ROVER · 2013 · Multiple/unspecified
…OMPANIED BY: -U0001-87 / 88 HIGH SPEED CAN BUS INVALID SERIAL DATA RECEIVED / MISSING MESSAGE. CHCM DTCS LOGGED: -U0131-00 CHASSIS CONTROL MODULE (CHCM) LOST COMMS WITH PSCM. -U3003-62 BATTERY…
SourceRANGE ROVER · 2013 · Multiple/unspecified
…OMPANIED BY: -U0001-87 / 88 HIGH SPEED CAN BUS INVALID SERIAL DATA RECEIVED / MISSING MESSAGE. CHCM DTCS LOGGED: -U0131-00 CHASSIS CONTROL MODULE (CHCM) LOST COMMS WITH PSCM. -U3003-62 BATTERY…
SourceCX-5 · 2017 · Multiple/unspecified
POWER LIFTGATE INOPERATIVE WITH DTC U3003:16: Some customers may complain about an inoperative power liftgate (PLG) with DTC U3003:16 (Power liftgate (PLG) control module power supply voltage low input) is…
SourceCX-5 · 2018 · Multiple/unspecified
POWER LIFTGATE INOPERATIVE WITH DTC U3003:16: Some customers may complain about an inoperative power liftgate (PLG) with DTC U3003:16 (Power liftgate (PLG) control module power supply voltage low input) is…
SourceCX-5 · 2017 · Multiple/unspecified
Some customers may complain about an inoperative power liftgate (PLG) and the any of the following DTC's stored in memory: U3003:16 (Power liftgate (PLG) control module power supply voltage low…
SourceCX-5 · 2018 · Multiple/unspecified
Some customers may complain about an inoperative power liftgate (PLG) and the any of the following DTC's stored in memory: U3003:16 (Power liftgate (PLG) control module power supply voltage low…
SourceCX-5 · 2019 · Multiple/unspecified
Some customers may complain about an inoperative power liftgate (PLG) and the any of the following DTC's stored in memory: U3003:16 (Power liftgate (PLG) control module power supply voltage low…
SourceCX-5 · 2020 · Multiple/unspecified
Some customers may complain about an inoperative power liftgate (PLG) and the any of the following DTC's stored in memory: U3003:16 (Power liftgate (PLG) control module power supply voltage low…
SourceCX-5 · 2021 · Multiple/unspecified
Some customers may complain about an inoperative power liftgate (PLG) and the any of the following DTC's stored in memory: U3003:16 (Power liftgate (PLG) control module power supply voltage low…
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