P0EE9: Battery Charger Coupler Temperature Sensor B Circuit Low

P0EE9 reports that the voltage of coupler temperature sensor B lies under its valid window. What that means thermally depends on the element. An NTC thermistor loses resistance when heated, so a low signal reads as an extremely hot pin. The PT1000 platinum sensors that Sailtran places at the DC+ and DC- contacts of its CCS2 inlet behave the other way round, and in a pull-up circuit a low signal looks implausibly cold. A short to ground pulls the line down with either type, and water in the inlet can do the same. No manufacturer documents P0EE9 publicly. Bentley's TPI 2075291/1 for the 2024 Bentayga Hybrid shows for sensor A that Low is P0D9B, even though the charger unit 00C6 showed the texts of Low and High swapped. P0EEA is the high-signal sibling.

Symptoms

• Charging not started or stopped
• Reduced charging power

Most likely causes

• Sensor B signal wire shorted to ground
• Moisture or water in the charging inlet
• Shorted sensor element B

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 P0EE9 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• E: Subsystem depends on the code range
• E9: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0EE9?

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 P0EE9?

The most common causes are: sensor B signal wire shorted to ground; moisture or water in the charging inlet; shorted sensor element B.

Related codes

• P0EE7Battery Charger Coupler Temperature Sensor B Circuit
• P0EE8Battery Charger Coupler Temperature Sensor B Circuit Range/Performance
• P0EEABattery Charger Coupler Temperature Sensor B Circuit High
• P0EEBBattery Charger Coupler Temperature Sensor B Circuit Intermittent/Erratic
• P0D9BBattery Charger Coupler Temperature Sensor A Circuit Low

Sources

• sailtran.com: ccs2 200a250a dc charging socket
• static.nhtsa.gov: MC 11008715 0001
• law.cornell.edu: 13 CCR 1968.2

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.