Audi fault codes
| Error Code | Description | Possible Cause |
|---|---|---|
| P0100 | Mass Air Flow (MAF) sensor malfunction | Dirty sensor, wiring issue |
| P0101 | MAF sensor range/performance problem | Air leak (vacuum leak) |
| P0102 | MAF sensor low input | Poor connection |
| P0103 | MAF sensor high input | Short circuit |
| P0104 | MAF sensor intermittent signal | Unstable connection |
| P0105 | MAP sensor malfunction | Faulty sensor |
| P0106 | MAP sensor range/performance | Vacuum leak or sensor issue |
| P0107 | MAP sensor low input | Open circuit |
| P0108 | MAP sensor high input | Short circuit or sensor fault |
| P0109 | MAP sensor intermittent signal | Wiring issue |
| P0110 | Intake air temperature sensor malfunction | Sensor or connector issue |
| P0111 | Intake air temperature range problem | Faulty sensor |
| P0112 | Intake air temperature low input | Short circuit |
| P0113 | Intake air temperature high input | Open circuit |
| P0114 | Intake air temperature intermittent | Poor connection |
| P0115 | Engine coolant temperature sensor malfunction | Faulty sensor |
| P0116 | Coolant temperature range/performance | Sensor issue |
| P0117 | Coolant temperature low input | Short circuit |
| P0118 | Coolant temperature high input | Open circuit |
| P0119 | Coolant temperature intermittent | Wiring issue |
| P0120 | Throttle position sensor malfunction | Sensor wear |
| P0121 | Throttle position range/performance | Sensor fault |
| P0122 | Throttle position low input | Open circuit |
| P0123 | Throttle position high input | Short circuit |
| P0124 | Throttle position intermittent | Connection issue |
| P0125 | Insufficient coolant temperature | Thermostat stuck open |
| P0126 | Coolant temperature below regulation | Thermostat issue |
| P0127 | Intake air temperature too high | Overheating air |
| P0128 | Coolant temperature below normal | Faulty thermostat |
| P0130 | O2 sensor circuit malfunction (Bank 1) | Faulty oxygen sensor |
| P0131 | O2 sensor low voltage | Lean condition |
| P0132 | O2 sensor high voltage | Rich condition |
| P0133 | O2 sensor slow response | Worn sensor |
| P0134 | O2 sensor no activity | Dead sensor or wiring |
| P0135 | O2 sensor heater circuit malfunction | Heater failure |
| P0136 | O2 sensor circuit malfunction (Bank 1 Sensor 2) | Sensor fault |
| P0137 | O2 sensor low voltage (Sensor 2) | Lean condition |
| P0138 | O2 sensor high voltage (Sensor 2) | Rich condition |
| P0139 | O2 sensor slow response (Sensor 2) | Aging sensor |
| P0140 | O2 sensor no activity (Sensor 2) | Faulty sensor |
| P0141 | O2 sensor heater malfunction (Sensor 2) | Heater circuit issue |
| P0142 | O2 sensor circuit malfunction | Sensor failure |
| P0143 | O2 sensor low input | Open circuit |
| P0144 | O2 sensor high input | Short circuit |
| P0145 | O2 sensor slow response | Sensor wear |
| P0146 | O2 sensor no activity | Faulty sensor |
| P0147 | O2 sensor heater circuit malfunction | Heater issue |
| P0148 | Fuel delivery error | Fuel pressure issue |
| P0149 | Fuel timing error | Fuel pump or injectors |
| P0150 | O2 sensor circuit malfunction (Bank 2 Sensor 1) | Faulty oxygen sensor |
| P0151 | O2 sensor low voltage (Bank 2 Sensor 1) | Lean mixture |
| P0152 | O2 sensor high voltage (Bank 2 Sensor 1) | Rich mixture |
| P0153 | O2 sensor slow response (Bank 2 Sensor 1) | Worn sensor |
| P0154 | O2 sensor no activity (Bank 2 Sensor 1) | Sensor failure or wiring |
| P0155 | O2 sensor heater malfunction (Bank 2 Sensor 1) | Heater circuit fault |
| P0156 | O2 sensor circuit malfunction (Bank 2 Sensor 2) | Sensor issue |
| P0157 | O2 sensor low voltage (Bank 2 Sensor 2) | Lean condition |
| P0158 | O2 sensor high voltage (Bank 2 Sensor 2) | Rich condition |
| P0159 | O2 sensor slow response (Bank 2 Sensor 2) | Aging sensor |
| P0160 | O2 sensor no activity (Bank 2 Sensor 2) | Faulty sensor |
| P0161 | O2 sensor heater malfunction (Bank 2 Sensor 2) | Heater issue |
| P0162 | O2 sensor circuit malfunction | Wiring problem |
| P0163 | O2 sensor low input | Open circuit |
| P0164 | O2 sensor high input | Short circuit |
| P0165 | O2 sensor slow response | Sensor wear |
| P0166 | O2 sensor no activity | Faulty sensor |
| P0167 | O2 sensor heater circuit malfunction | Heater failure |
| P0170 | Fuel trim malfunction (Bank 1) | Fuel system issue |
| P0171 | System too lean (Bank 1) | Vacuum leak, low fuel pressure |
| P0172 | System too rich (Bank 1) | Injectors, fuel pressure |
| P0173 | Fuel trim malfunction (Bank 2) | Fuel system issue |
| P0174 | System too lean (Bank 2) | Vacuum leak |
| P0175 | System too rich (Bank 2) | Fuel system fault |
| P0176 | Fuel composition sensor malfunction | Sensor issue |
| P0177 | Fuel composition sensor range/performance | Sensor fault |
| P0178 | Fuel composition sensor low input | Open circuit |
| P0179 | Fuel composition sensor high input | Short circuit |
| P0180 | Fuel temperature sensor malfunction | Faulty sensor |
| P0181 | Fuel temperature range/performance | Sensor issue |
| P0182 | Fuel temperature low input | Short circuit |
| P0183 | Fuel temperature high input | Open circuit |
| P0184 | Fuel temperature intermittent | Wiring issue |
| P0185 | Fuel temp sensor B malfunction | Sensor fault |
| P0186 | Fuel temp sensor B range/performance | Sensor issue |
| P0187 | Fuel temp sensor B low input | Open circuit |
| P0188 | Fuel temp sensor B high input | Short circuit |
| P0189 | Fuel temp sensor B intermittent | Wiring problem |
| P0190 | Fuel rail pressure sensor malfunction | Sensor issue |
| P0191 | Fuel rail pressure range/performance | Pressure problem |
| P0192 | Fuel rail pressure low input | Low fuel pressure |
| P0193 | Fuel rail pressure high input | High pressure |
| P0194 | Fuel rail pressure intermittent | Wiring issue |
| P0195 | Engine oil temperature sensor malfunction | Sensor fault |
| P0196 | Engine oil temperature range/performance | Sensor issue |
| P0197 | Engine oil temperature low input | Short circuit |
| P0198 | Engine oil temperature high input | Open circuit |
| P0199 | Engine oil temperature intermittent | Wiring issue |
| P0200 | Injector circuit malfunction | Wiring issue or faulty injector |
| P0201 | Injector circuit cylinder 1 | Injector or wiring fault |
| P0202 | Injector circuit cylinder 2 | Injector or wiring fault |
| P0203 | Injector circuit cylinder 3 | Injector or wiring fault |
| P0204 | Injector circuit cylinder 4 | Injector or wiring fault |
| P0205 | Injector circuit cylinder 5 | Injector or wiring fault |
| P0206 | Injector circuit cylinder 6 | Injector or wiring fault |
| P0207 | Injector circuit cylinder 7 | Injector or wiring fault |
| P0208 | Injector circuit cylinder 8 | Injector or wiring fault |
| P0209 | Injector circuit cylinder 9 | Injector or wiring fault |
| P0210 | Injector circuit cylinder 10 | Injector or wiring fault |
| P0211 | Injector circuit cylinder 11 | Injector or wiring fault |
| P0212 | Injector circuit cylinder 12 | Injector or wiring fault |
| P0213 | Cold start injector malfunction | Faulty injector or control |
| P0214 | Cold start injector circuit issue | Wiring problem |
| P0215 | Engine shutdown solenoid malfunction | Solenoid fault |
| P0216 | Injection timing control malfunction | Timing system issue |
| P0217 | Engine overtemperature condition | Cooling system fault |
| P0218 | Transmission overtemperature condition | Overheating transmission |
| P0219 | Engine overspeed condition | Rev limit exceeded |
| P0220 | Throttle position sensor B malfunction | Sensor fault |
| P0221 | Throttle position sensor B range/performance | Sensor issue |
| P0222 | Throttle position sensor B low input | Open circuit |
| P0223 | Throttle position sensor B high input | Short circuit |
| P0224 | Throttle position sensor B intermittent | Wiring issue |
| P0225 | Throttle/pedal position sensor C malfunction | Sensor fault |
| P0226 | Throttle/pedal position sensor C range/performance | Sensor issue |
| P0227 | Throttle/pedal position sensor C low input | Open circuit |
| P0228 | Throttle/pedal position sensor C high input | Short circuit |
| P0229 | Throttle/pedal position sensor C intermittent | Wiring issue |
| P0230 | Fuel pump primary circuit malfunction | Relay or wiring issue |
| P0231 | Fuel pump secondary circuit low | Low voltage |
| P0232 | Fuel pump secondary circuit high | Short circuit |
| P0233 | Fuel pump secondary circuit intermittent | Wiring issue |
| P0234 | Turbocharger overboost condition | Wastegate or control fault |
| P0235 | Turbo boost sensor A malfunction | Faulty sensor |
| P0236 | Turbo boost sensor range/performance | Sensor issue |
| P0237 | Turbo boost sensor low input | Open circuit |
| P0238 | Turbo boost sensor high input | Short circuit |
| P0239 | Turbo boost sensor intermittent | Wiring problem |
| P0240 | Turbo boost sensor B malfunction | Sensor fault |
| P0241 | Turbo boost sensor B range/performance | Sensor issue |
| P0242 | Turbo boost sensor B low input | Open circuit |
| P0243 | Turbo wastegate solenoid malfunction | Solenoid fault |
| P0244 | Turbo wastegate solenoid range/performance | Control issue |
| P0245 | Turbo wastegate solenoid low input | Open circuit |
| P0246 | Turbo wastegate solenoid high input | Short circuit |
| P0247 | Turbo wastegate solenoid B malfunction | Solenoid issue |
| P0248 | Turbo wastegate solenoid B range/performance | Control fault |
| P0249 | Turbo wastegate solenoid B low input | Wiring issue |