P0D9A

What it means

P0D9A is a generic powertrain code meaning the control unit has found the signal from the battery charger coupler temperature sensor A to be out of range or implausible. The coupler is the charge inlet or connector area on a plug-in hybrid or electric vehicle. The control unit saw a reading that did not match expected behaviour, for example a value that was stuck, drifting, or at odds with ambient temperature or other temperature sensors. The exact sensor location and the plausibility test depend on the model.

Symptoms

• Warning light on (EV system, hybrid system or malfunction indicator, depending on the model)
• Charging slows down, is limited or will not start
• Charging stops part way through a session
• Charge port or inlet feels unusually hot or the charging cable gets warm
• Charging works on some chargers or at some times but not others
• Reduced power or a limp mode in some models

Possible causes

• Faulty charge inlet temperature sensor giving a drifting, stuck or implausible readinglikely
• Damaged, corroded or loose wiring or connector at the sensor or charge inlet assemblylikely
• Moisture, dirt or corrosion in the charge port affecting the sensor or its connectorpossible
• Overheating of the charge inlet pins caused by worn, damaged or poorly seated contacts, causing a genuine temperature mismatchpossible
• Fault in the charger control module or on-board charger that reads the sensorrare
• Outdated or faulty control unit software where the manufacturer has issued a correction for the plausibility checkrare

How to diagnose

1. Read all stored and pending codes and note the freeze frame data, including ambient temperature, charging state and when the code set
2. Check for manufacturer service bulletins and software updates relevant to the model and charging system
3. Visually inspect the charge port and inlet for water, dirt, corrosion, burnt marks, bent pins or heat damage
4. Inspect the sensor wiring and connectors for chafing, pushed-back pins, corrosion and a poor fit
5. Compare the live coupler temperature reading with ambient and other temperature sensors on a cold car, where it should read similar values
6. Monitor the live value while wiggling the harness and during a charging session to see whether it jumps, sticks or climbs abnormally
7. Check the sensor circuit resistance, supply and signal wiring against the manufacturer's data for the model
8. Try a different charging cable and charger to rule out an external source of overheating

How to fix

• Clean and dry the charge port and connector, and fix any water ingress source
• Repair or replace damaged wiring and connectors in the sensor circuit
• Replace the charge inlet assembly or temperature sensor if it is faulty or the pins are heat damaged
• Replace worn charging cables or adaptors that cause excess heat at the inlet
• Update the control unit software where a known fault is addressed by a manufacturer revision
• Repair or replace the charger control module only after the sensor, wiring and inlet are proved good

Can I keep driving?

Nearby codes

• P0D99GenericBattery Charger Coupler Temperature Sensor A Circuit
• P0D9BGenericBattery Charger Coupler Temperature Sensor A Circuit Low