P31E7 on Audi
AC Power Supply Cable - Open Circuit
P31E7 on Audi vehicles indicates ac power supply cable - open circuit. Au7o has documented this code across 1 Audi model — most commonly on e-tron. The high-voltage battery charger has detected an open circuit on the AC power supply cable path - it cannot see continuity on the incoming AC charging conductor it expects. AC charging is blocked. Audi TSB 2061788 lists DTC P31E700 among the codes stored in J1050 on 2020-2021 e-tron quattro and e-tron Sportback vehicles running onboard-charger software 0070, where the underlying cause was charger software rather than a broken cable.
Common Causes of P31E7
- •Outdated onboard-charger software (level 0070) generating a false open-circuit detection - Audi TSB 2061788
- •Damaged or worn AC charging cable / portable charger unit
- •Poor connection or corroded pins at the AC charging socket
- •Open or high-resistance AC supply wiring between the socket and J1050
- •Failed wall box or supply-side circuit
P31E7 on Audi by Model
Audi e-tron(1 issue)
- 2021 e-tron Charging Interruptions with Onboard-Charger Software 0070 - Diagnosis Required2021
Audi TSB 2061788/2 covers model-year 2021 e-tron quattro and e-tron Sportback vehicles with specified AC/DC charging interruptions, charging-flap operation problems, or an app request for auxiliary heating that does not pre-heat the vehicle when matching DTCs are stored in high-voltage battery charger control module J1050. Audi attributes the documented condition to onboard-charger software and identifies old software level 0070, not a proven failed charger module.
Looking for P31E7 on a different make?
View P31E7 across all makes →Frequently Asked Questions
What does P31E7 mean on Audi?▼
P31E7 stands for "AC Power Supply Cable - Open Circuit." The high-voltage battery charger has detected an open circuit on the AC power supply cable path - it cannot see continuity on the incoming AC charging conductor it expects. AC charging is blocked. Audi TSB 2061788 lists DTC P31E700 among the codes stored in J1050 on 2020-2021 e-tron quattro and e-tron Sportback vehicles running onboard-charger software 0070, where the underlying cause was charger software rather than a broken cable. On Audi specifically, this code is documented across 1 model.
What causes P31E7 on Audi vehicles?▼
Common causes on Audi: Outdated onboard-charger software (level 0070) generating a false open-circuit detection - Audi TSB 2061788, Damaged or worn AC charging cable / portable charger unit, Poor connection or corroded pins at the AC charging socket, Open or high-resistance AC supply wiring between the socket and J1050, Failed wall box or supply-side circuit. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P31E7 on a Audi?▼
Repair costs vary widely depending on the root cause and specific Audi model.
Which Audi models have P31E7 documented?▼
Au7o has documented P31E7 on 1 Audi model: e-tron.