P0D29: Battery Charger Input Current Too Low

P0D29 is set when the on-board charger draws less AC current than expected for the power it was asked to deliver, while voltage and charging permission are present. No manufacturer documents P0D29 publicly. Related tests show how such a check is built: GM's Volt compares the AC input current with fixed limits for the high side (P0D2A), and Mitsubishi first verifies that the input current sensor reads plausibly before trusting it (P0D39). A low current with normal voltage points to a charger that does not ramp up, high resistance at the inlet or cable, an EVSE that limits current, or a measurement fault. CARB requires charger faults that limit the charging rate to be detected. Charging is slower than usual or stops. Too much current is P0D2A, voltage problems P0D27/P0D28.

Symptoms

• AC charging much slower than usual
• Charging stops or charging system warning

Most likely causes

• Charger power stage not ramping up
• High resistance at the charge inlet, cable or plug contacts
• Input current sensor reading too low
• Charging station or cable limiting current more than signalled

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. With the connector unplugged, check whether the signal wire is making contact with ground.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

Good to know

• Repair difficulty: medium

What each character of P0D29 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• D: Subsystem depends on the code range
• 29: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0D29?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0D29?

The most common causes are: charger power stage not ramping up; high resistance at the charge inlet, cable or plug contacts; input current sensor reading too low.

Related codes

• P0D2ABattery Charger Input Current Too High
• P0D3ABattery Charger A Input Current Sensor Circuit Low
• P0D39Battery Charger A Input Current Sensor Circuit Range/Performance
• P0D27Battery Charger Input Voltage Too Low

Sources

• law.cornell.edu: 13 CCR 1968.2
• gsi.ext.gm.com: 12OBDG01A HYBRID Diagnostics
• mitsubishitechinfo.com: M154950390001600USA

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.