P0EB6 Moderate Generic / SAE

P0EB6: Air Conditioning Compressor Motor Phase V Current Sensor Circuit Low

Powertrain Electrified Powertrain Auxiliaries Emissions related

What to do

Expect no air conditioning, and no cabin heating on a heat-pump car. The car drives normally. If a scan lists several of these with numbers that look unrelated, they may well be one family — the standard allocated them out of order.

What this code means

The circuit for the sensor measuring phase V of the air conditioning compressor motor is faulty.

These are the instruments for the three phase currents, where P0D7A to P0D7F were the readings — the same instrument-versus-reading split the corpus draws at P0A51 against P0A5D.

The three currents must sum to zero at every instant, which lets the module audit its own sensors against arithmetic with no reference value at all. That identity is described at P0DFA and it is the fourth place the corpus meets it.

One phase's sensor unreachable breaks the audit for all three, because the sum can no longer be computed — so a single sensor circuit fault costs the compressor its self-check as well as one measurement.

This family is allocated out of sequence, and it is the most scrambled layout in the corpus. The standard put Phase V's Circuit High, Circuit Low and Range/Performance at P0EB5–P0EB7 and Phase W's at P0EB8–P0EBA — then allocated their base Circuit codes afterwards, at P0EBB and P0EC0, with the refrigerant temperature sensor family sitting between them. Phase U is the only one of the three whose four codes are contiguous. Both out-of-sequence codes were fetched and confirmed rather than inferred; nothing about the numbering is predictable here.

At or below the lower limit.

Likely causes

Start here

Faulty electric air conditioning compressor · specialist
Corroded or loose connector · specialist
Open circuit in sensor wiring · specialist

Less common

Damaged wiring harness · specialist
Failed sensor reference voltage supply · specialist

Symptoms

Components involved

Information, not instruction

CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.

Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.

Community experience

Be the first to write this up

Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.

What makes one worth reading:

The car — make, model, year and engine. The same fault behaves differently on each.
What you measured, not only what you replaced.
What actually fixed it — or that nothing did, which is worth knowing too.