P31CF on 2021 Audi e-tron (e-tron quattro, e-tron Sportback) — Charge Cover A Recognition - Cover Locking
1 vehicles · 1 makes
How to diagnose and fix P31CF: most-reported vehicles
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Audi e-tron · 2021–2021
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.
Common Symptoms
- AC or DC charging is interrupted
- DC charging does not start or stops at some stations
- Charging-flap button is inoperative or the flap does not open
- Auxiliary heating is activated through the app but the vehicle does not pre-heat
How to Fix
Record whether the failure is AC, DC or station-specific and have J1050 scanned before parts. If the vehicle has the matching condition and software level 0070, Audi directs an SVM update to software 0079 or higher. After the update, reproduce the concern and follow the guided test plan for any new active DTC. Do not assume a hardware failure just because one charging mode works.
Owner tips & cautions
- TipBring the failed station, date and charging mode to the diagnosis and ask for the J1050 software level and full DTC list before authorizing hardware.
Sources for this issue (1)
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P31CF code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P31CF mean?
P31CF stands for "Charge Cover A Recognition - Cover Locking." The onboard charger cannot correctly recognise the state of charge cover A's locking mechanism - the module's read of whether the charge flap/cover is locked or unlocked does not agree with the commanded state or the sensor feedback. Because the charger will not energise a socket whose cover state it cannot verify, this blocks or interrupts charging. Audi TSB 2061788 lists DTC P31CF00 among the codes stored in high-voltage battery charger J1050 on 2020-2021 e-tron quattro and e-tron Sportback with onboard-charger software level 0070.
What are the most common causes of P31CF?
The most common causes of P31CF are: Outdated onboard-charger software (level 0070) - Audi's remedy is the OBC software update per TSB 2061788, Faulty charge-cover locking actuator or its position feedback, Moisture or corrosion in the charge-door connector affecting LIN feedback, Charge flap mechanically obstructed, iced, or misaligned. The specific cause varies by vehicle.
How much does it cost to fix P31CF?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P31CF?
Au7o has documented P31CF across 1 vehicle models from 1 manufacturers: Audi.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.