P0D9D

What it means

P0D9D is a generic powertrain code meaning the control unit has seen an intermittent or erratic signal from the battery charger coupler temperature sensor 'A' circuit. The coupler is the charge inlet or connector area on a plug-in hybrid or electric vehicle, and the sensor monitors its temperature during charging. The signal jumped, dropped out or behaved implausibly rather than staying steadily out of range. Sensor location and naming vary by model, so check the manufacturer's data.

Symptoms

• Warning light on the dashboard, such as a hybrid or EV system fault or a malfunction indicator
• Charging stops, will not start or restarts repeatedly
• Charging is slower than normal because charge current is limited
• Fault appears and disappears, often when the charge cable is moved or in wet weather
• Charge port or connector may be reported as overheating when it is not

Possible causes

• Loose, corroded or contaminated terminals at the charge inlet or sensor connectorlikely
• Damaged, chafed or intermittently open wiring between the sensor and the charger or control unitlikely
• Water ingress in the charge inlet or its harness connectorpossible
• Failing coupler temperature sensor, such as a thermistor with an internal intermittent faultpossible
• Worn or damaged charge inlet assembly, with poor contact or heat damagepossible
• Fault inside the on-board charger or control unit, or a software issuerare

How to diagnose

1. Read all stored and pending codes and the freeze frame data, noting charge state and temperature readings when the code set
2. Check for related codes, such as other charger, coupler or temperature sensor circuit codes, and deal with those first
3. Visually inspect the charge inlet for moisture, debris, burnt marks, bent or discoloured pins, and check the charge cable and plug as well
4. Inspect the sensor wiring and connectors for chafing, corrosion, water and pin tension, and wiggle-test the harness while watching live temperature data
5. Compare the live coupler temperature with ambient temperature on a cold car, looking for jumps, dropouts or implausible values
6. Check the sensor and circuit resistance, supply and reference voltage against the manufacturer's specification, as values depend on the model
7. Try a different known good charge cable and charging point to rule out an external fault, then clear the code and retest
8. Check for software updates or technical bulletins for the model if no hardware fault is found

How to fix

• Clean and secure the connector, or repair the damaged terminals
• Repair or replace damaged wiring in the sensor circuit
• Dry out and seal any water ingress, and fix the source of the leak
• Replace the coupler temperature sensor or the charge inlet assembly if it is built in or damaged
• Replace or repair the charger or control unit only after the wiring and sensor have been proven good
• Apply a manufacturer software update if an outdated calibration is a known cause for that model

Can I keep driving?

Nearby codes

• P0D9CGenericBattery Charger Coupler Temperature Sensor A Circuit High
• P0D9EGenericBattery Charger A Coupler Lock Position Sensor Circuit