Audi e-tron OBD-II Diagnostic Guide
Comprehensive diagnostic trouble code telemetry, sensor voltage thresholds, and step-by-step repair manuals for Audi e-tron models equipped with Dual Motor AWD (400HP / e-tron GT quattro 469HP / RS 590HP).
Audi e-tron Problem & Reliability Intelligence by Year
Top Check Engine Trouble Codes for Audi e-tron
U0100 on Audi e-tron: Diagnosis & Fix
Troubleshooting procedure for U0100: U0100: Lost Communication With Engine Control Module (ECM / PCM) specifically affecting Audi e-tron (Dual Motor AWD (400HP / e-tron GT quattro 469HP / RS 590HP)).
U0121 on Audi e-tron: Diagnosis & Fix
Troubleshooting procedure for U0121: U0121: Lost Communication With Anti-Lock Brake System (ABS) Control Module specifically affecting Audi e-tron (Dual Motor AWD (400HP / e-tron GT quattro 469HP / RS 590HP)).
U0140 on Audi e-tron: Diagnosis & Fix
Troubleshooting procedure for U0140: U0140: Lost Communication With Body Control Module (BCM) specifically affecting Audi e-tron (Dual Motor AWD (400HP / e-tron GT quattro 469HP / RS 590HP)).
U0155 on Audi e-tron: Diagnosis & Fix
Troubleshooting procedure for U0155: U0155: Lost Communication With Instrument Panel Cluster (IPC) specifically affecting Audi e-tron (Dual Motor AWD (400HP / e-tron GT quattro 469HP / RS 590HP)).
All OBD-II Codes for Audi e-tron
P0300: Random or Multiple Cylinder Misfire Detected
P0420: Catalyst System Efficiency Below Threshold (Bank 1)
P0171: System Too Lean (Bank 1)
P0128: Coolant Temperature Below Thermostat Regulating Temperature
P0455: Evaporative Emission Control System Leak Detected (Gross Leak)
Mass Air Flow (MAF) Sensor Circuit Range/Performance
O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
System Too Rich (Bank 1) - Symptoms, Causes & Step-by-Step Fix
EVAP System Small Leak Detected - Diagnosis & Repair Guide
Idle Control System RPM Higher Than Expected - Diagnosis
P0010: Camshaft Position Actuator Circuit / Open (Bank 1)
P0011: Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
P0012: Camshaft Position - Timing Over-Retarded (Bank 1)
P0013: Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)
P0014: Exhaust Camshaft Position Timing Over-Advanced (Bank 1)
P0016: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
P0017: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B)
P0100: Mass or Volume Air Flow Circuit Malfunction
Frequently Asked Questions
Where is the OBD-II diagnostic port located on the Audi e-tron?
On the Audi e-tron (2020–2026), the standard 16-pin DLC port is located: Driver footwell near OBD bulkhead interface. It supports SAE J1979 / ISO 15765-4 CAN protocols for all handheld OBD-II code readers.
What are the most common Check Engine fault codes on the Audi e-tron?
The most frequently logged trouble codes on the Audi e-tron (Dual Motor AWD (400HP / e-tron GT quattro 469HP / RS 590HP)) include U0100, U0121, P0A80, U0140.
How does an onboard diagnostic scan communicate with the Audi e-tron?
Connecting an OBD-II scanner to the Audi e-tron's 16-pin DLC port establishes a high-speed CAN link (ISO 15765-4) with the ECM/PCM. It interrogates SAE J1979 Modes $01 through $0A for active DTCs, freeze-frame sensor telemetry, and oxygen sensor readiness monitors.

