P0EEB: Battery Charger Coupler Temperature Sensor B Circuit Intermittent/Erratic

P0EEB catches a sensor B signal from the charging inlet that jumps or drops out for moments. A metal contact and its plastic housing have real thermal mass, so a change of many degrees within milliseconds cannot be a true temperature and points to the circuit. No manufacturer documents P0EEB publicly. A Mercedes bulletin about the first inlet sensor of the third-generation smart with its optional 22 kW unit fits the pattern: inlet sensor codes there came from loose low-voltage contacts at the charger, the fix was to work the plugs gently and watch whether charging starts, and the bulletin warns the fault may only appear with warm or cold parts at the start or end of charging. Typical for P0EEB is a session that stops without visible reason and works next time. Steady faults are P0EE9 and P0EEA.

Symptoms

• Charging stops sporadically
• Fault cannot be reproduced at once

Most likely causes

• Loose contact in the sensor B circuit or at the charger plug
• Moisture that comes and goes in the inlet connector
• Cracked sensor element with temperature-dependent contact

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. Gently move the wiring with the engine running and watch whether the reading changes.
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 P0EEB means

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

Frequently asked questions

Can I keep driving with code P0EEB?

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 P0EEB?

The most common causes are: loose contact in the sensor B circuit or at the charger plug; moisture that comes and goes in the inlet connector; cracked sensor element with temperature-dependent contact.

Related codes

• P0EE7Battery Charger Coupler Temperature Sensor B Circuit
• P0EE8Battery Charger Coupler Temperature Sensor B Circuit Range/Performance
• P0EE9Battery Charger Coupler Temperature Sensor B Circuit Low
• P0EEABattery Charger Coupler Temperature Sensor B Circuit High
• P0D9DBattery Charger Coupler Temperature Sensor A Circuit Intermittent/Erratic

Sources

• static.nhtsa.gov: MC 10144078 9999
• sailtran.com: ccs2 200a250a dc charging socket
• 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.