Faulty charging station or household outlet delivering insufficient current; Damaged or worn charging cable, connector, or plug; Blown fuse or tripped circuit breaker in the charging circuit; High resistance in the wiring between the charge port and the charger module; Internal failure of the battery charger module; Poor ground connection for the charger circuit; Software glitch in the charger control module requiring recalibration

DTC codes / P0Dxx · Hybrid propulsion / P0D29

P0D29Battery Charger Input Current Too Low

Q: What does code P0D29 mean?

Battery Charger Input Current Too Low. P0D29 is a generic powertrain code indicating that the battery charger input current is too low, as detected by the battery charger control module. The module monitors the current drawn from the AC supply or charging source and sets this code when the measured input current falls below the expected threshold for the charging conditions.

P0D29 is a generic powertrain code indicating that the battery charger input current is too low, as detected by the battery charger control module. The module monitors the current drawn from the AC supply or charging source and sets this code when the measured input current falls below the expected threshold for the charging conditions.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

Charging system warning light or message on the dashboard
Battery fails to charge or charges very slowly
Reduced electric-only range or poor hybrid performance
The vehicle may not start after being plugged in
Often no symptoms besides the warning light

Common causes, most likely first

Faulty charging station or household outlet delivering insufficient current
Damaged or worn charging cable, connector, or plug
Blown fuse or tripped circuit breaker in the charging circuit
High resistance in the wiring between the charge port and the charger module
Internal failure of the battery charger module
Poor ground connection for the charger circuit
Software glitch in the charger control module requiring recalibration

How to diagnose and fix it

Verify the charging source by testing the outlet or charging station with another vehicle or a multimeter
Inspect the charging cable and connectors for damage, corrosion, or loose pins
Check all fuses and circuit breakers related to the charging system
Measure voltage drop across the charging circuit wiring and grounds to identify high resistance
Perform a visual inspection of the charge port and charger module connectors for signs of overheating or loose terminals
Use a scan tool to monitor live input current data and compare with specifications
If all external factors are ruled out, test or replace the battery charger module as per manufacturer procedures

Don't overlook the charging station

A common oversight is blaming the vehicle when the actual problem is a weak public charging station or a worn outlet at home, so always test with a known-good power source first.
The code can be set by a marginal connection at the charge port that only shows up under load, so wiggle tests and voltage drop measurements are more reliable than a simple visual check.
Some vehicles set P0D29 when the charging current is intentionally limited by the charger's software due to a detected fault elsewhere, so clearing the code without addressing the root cause will only lead to a repeat.
High ambient temperatures or a hot charging cable can cause the charger to derate current, and if the derating is severe enough, it may trigger this code even though no hardware has failed.
A weak 12-volt auxiliary battery can cause erratic behavior in the charger control module, leading to false input current readings, so always check the auxiliary battery's state of health.

Can I keep driving with P0D29?

You can usually continue driving the vehicle using the internal combustion engine or existing battery charge, but avoid relying on the charging system until the fault is repaired. Do not attempt to charge the vehicle if you suspect a damaged cable or outlet, as this could pose a safety risk.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.