Alfa Romeo cars are mainly equipped with Bosch control systems, including Bosch Motronic versions ML4.1, 1.7, 2.10.3 / 4, MP3.1 and Multec XM and Weber IAF 8F BB. All Alfa systems control the primary circuit of the ignition system, the injectors and the idling system, the stroke from one unit.
Bosch Motronic M 1.7 For reading the codes in any way, a 3-pin connector is provided, usually located under the dashboard on the passenger side next to the BEU.
P0100 Airflow Circuit Malfunction
P0101 Wrong indicator / air flow meter not adjusted
P0102 Low air mass meter reading
P0103 High air mass meter reading
P0104 Malfunction of the air mass meter
P0105 Intake Manifold Absolute Pressure Sensor Circuit / Intake Manifold Barometric Pressure Malfunction
P0106 Invalid indicator / the intake manifold absolute pressure / barometric pressure sensor of the intake manifold
P0107 Low Intake Manifold Absolute Pressure / Intake Manifold Pressure
P0108 High Intake Manifold Absolute Pressure / Barometric Pressure Sensor
P0109 Intake Manifold Absolute Pressure / Intake Manifold Pressure Sensor Malfunction
P0109 Intake Air Temperature Sensor Circuit Malfunction
P0111 Invalid indicator / inlet air temperature sensor not adjusted
P0112 Inlet temperature sensor low
P0113 High intake air temperature sensor
P0114 Inlet air temperature sensor fault
P0115 Engine Coolant Temperature Sensor Circuit Malfunction
P0116 Invalid indicator / engine coolant temperature sensor not adjusted
P0117 Engine Coolant Temperature Sensor Low
P0118 High Engine Coolant Temperature Sensor
P0119 Engine Coolant Temperature Sensor Fault
P0120 Throttle Position Sensor Circuit Malfunction / Switch A
P0121 Invalid indicator / Throttle position sensor / A switch not adjusted
P0122 Low Throttle Position Sensor / Switch A
P0123 High Throttle Position Sensor / Switch A
P0124 Malfunction of the throttle position sensor / switch A
P0125 Coolant temperature too low or too high
P0126 Coolant temperature is different from normal
P0130 O2 sensor circuit fault (bank 1, sensor 1)
P0131 Oxygen sensor circuit low voltage (bank 1, sensor 1)
P0132 High oxygen sensor circuit voltage (bank 1, sensor 1)
P0133 The oxygen sensor responds late (bank 1, sensor 1)
P0134 The oxygen sensor does not work (bank 1, sensor 1)
P0135 Heated oxygen sensor circuit fault (bank 1, sensor 1)
P0136 O2 sensor heating circuit fault (bank 1, sensor 2)
P0137 The low voltage of the oxygen sensor heating circuit (bank 1, sensor 2)
P0138 High voltage of oxygen sensor heating circuit (bank 1, sensor 2)
P0139 The oxygen sensor (bank 1, sensor 2) responds with a delay,
P0140 The oxygen sensor heating circuit (bank 1, sensor 1) does not work
P0141 O2 sensor heating circuit fault (bank 1, sensor 2)
P0142 O2 sensor circuit fault (bank 1, sensor 3)
P0143 Low oxygen circuit voltage (bank 1, sensor 3)
P0144 High oxygen sensor circuit voltage (bank 1, sensor 3)
P0145 The oxygen sensor responds late (bank 1, sensor 3)
P0146 The oxygen sensor does not work (bank 1, sensor 3)
P0147 O2 sensor heating circuit fault (bank 1, sensor 3)
P0150 Malfunction of the oxygen sensor circuit (bank 2, sensor 1)
P0151 Oxygen sensor circuit low voltage (bank 2, sensor 1)
P0152 High oxygen sensor circuit voltage (bank 2, sensor 1)
P0153 The oxygen sensor responds late (bank 2, sensor 1)
P0154 The oxygen sensor does not work (bank 2, sensor 1)
P0155 O2 sensor heating circuit fault (bank 2, sensor 1)
P0156 Malfunction of the oxygen sensor circuit (bank 2, sensor 2)
P0157 Oxygen sensor circuit low voltage (bank 2, sensor 2)
P0158 High voltage of oxygen sensor circuit (bank 2, sensor 2)
P0159 The oxygen sensor responds late (bank 2, sensor 2)
P0160 The oxygen sensor does not work (bank 2, sensor 2)
P0161 O2 sensor circuit fault (bank 2, sensor 2)
P0162 O2 sensor circuit fault (bank 2, sensor 3)
P0163 Oxygen sensor circuit low voltage (bank 2, sensor 3)
P0164 High oxygen sensor circuit voltage (bank 2, sensor 3)
P0165 The oxygen sensor responds late (bank 2, sensor 3)
P0166 The oxygen sensor does not work (bank 2, sensor 3)
P0167 O2 sensor heating circuit fault (bank 2, sensor 3)
P0170 The composition of the mixture is incorrectly balanced (bank 1)
P0171 The mixture is poor (bank 1)
P0172 A mixture of rich (bank 1)
P0173 The composition of the mixture is incorrectly balanced (bank 2)
P0174 The mixture is poor (bank 2)
P0175 A mixture of rich (bank 2)
P0176 Malfunction in the mixer sensor circuit
P0177 Invalid indicator / not adjusted mixer sensor
P0178 Low Mixer Sensor Value
P0179 High Composition Sensor Indicator
P0180 Fuel temperature sensor A fault
P0181 Invalid indicator / not adjusted fuel temperature sensor A
P0182 Low Temperature Sensor A Temperature
P0183 High Temperature Sensor A
P0184 Fuel temperature sensor A fault
P0185 Fuel temperature sensor B fault
P0186 Invalid indicator / not adjusted Fuel temperature sensor B
P0187 Low Temperature Sensor B
P0188 High Temperature Sensor B
P0189 Fuel temperature sensor B fault
P0190 Fuel temperature sensor circuit fault
P0191 Invalid indicator / fuel temperature sensor not adjusted
P0192 Fuel Temperature Sensor Low
P0193 High fuel temperature sensor
P0194 Fuel temperature sensor fault
P0195 Oil Temperature Sensor Fault
P0196 Oil temperature sensor not correct / not adjusted
P0197 Low oil temperature sensor
P0198 High Oil Temperature Sensor
P0199 Oil temperature sensor fault
P0200 Fault in injector circuit
P0201 Injector malfunction – cylinder 1
P0202 Injector malfunction – cylinder 2
P0203 Injector malfunction – cylinder 3
P0204 Injector malfunction – cylinder 4
P0205 Injector malfunction – cylinder 5
P0206 Injector malfunction – cylinder 6
P0207 Injector malfunction – cylinder 7
P0208 Injector malfunction – cylinder 8
P0209 Injector malfunction – cylinder 9
P0210 Injector malfunction – cylinder 10
P0211 Injector malfunction – cylinder 11
P0212 Injector malfunction – cylinder 12
P0213 Malfunction of 1 injector at start-up
P0214 Fault 2 injectors on start-up
P0215 Engine Stop Valve Fault
P0216 Ignition timing adjustment fault
P0217 Engine overheating
P0218 Transmission overheat
P0219 Engine speed too high
P0220 Throttle Position Sensor Circuit Malfunction / Switch B
P0221 Incorrect indicator / Throttle position sensor not adjusted / Switch B
P0222 Throttle Position Sensor Low / Switch B
P0223 High Throttle Position Sensor / Switch B
P0224 Throttle Position Sensor Malfunction / Switch B
P0225 Throttle Position Sensor Circuit Malfunction / C Switch
P0226 Throttle Position Sensor / Switch C is not correct / not adjusted
P0227 Throttle Position Sensor Low / Switch C
P0228 High Throttle Position Sensor / Switch C
P0229 Malfunction of the throttle position sensor / Switch C
P0230 Fault in the primary fuel circuit
P0231 Low secondary fuel circuit voltage
P0232 High secondary fuel circuit secondary voltage
P0233 Fuel circuit secondary circuit fault
P0234 Motor overload
P0235 Malfunction in the turbocharger sensor circuit A
P0236 Invalid indicator / turbocharger sensor A not adjusted
P0237 Turbocharger sensor A low
P0238 High reading of turbocharger sensor A
P0239 Malfunction of turbocharger sensor B
P0240 Invalid indicator / turbocharger sensor B not adjusted
P0241 Low reading of turbocharger sensor B
P0242 High reading of turbocharger sensor B
P0243 Turbocharger Solenoid A Malfunction
P0244 Invalid indicator / turbocharger solenoid A not adjusted
P0245 Low Turbocharger Solenoid A
P0246 High Turbocharger Solenoid A
P0247 Malfunction of the turbocharger solenoid B
P0248 Invalid indicator / turbocharger solenoid B not adjusted
P0249 Low Turbocharger Solenoid B
P0250 The high value of the turbocharger solenoid B
P0251 Malfunction of the fuel sensor A of the injector pump (Cam / Rotor / Nozzle)
P0252 Invalid indicator / fuel sensor A of the injector pump (cam / rotor / nozzle) not adjusted
P0253 Fuel Injector Fuel Sensor Low Indicator A (Nozzle / Rotor / Nozzle)
P0254 Fuel Inlet Sensor A High Scale (Nozzle / Rotor / Nozzle)
P0255 Malfunction of the fuel sensor A of the injector pump (Cam / Rotor / Nozzle)
P0256 Fuel Injector B Fuel Sensor Malfunction (Cam / Rotor / Injector)
P0257 Incorrect indicator / fuel sensor B of the injector pump (cam / rotor / nozzle) not adjusted
P0258 Fuel Injector Fuel Sensor B Low (Nozzle / Rotor / Nozzle)
P0259 Fuel injector high sensor A of the injector pump (Cam / Rotor / Injector)
P0260 Fuel injector sensor failure A of the injector pump (Cam / Rotor / Injector)
P0261 Low Cylinder Injector Circuit Value 1
P0262 High Cylinder Injector Circuit Value 1
P0263 Invalidly balanced 1 cylinder
P0264 Cylinder 2 injector low
P0265 High Injector Circuit Value 2 Cylinder
P0266 Two cylinder is incorrectly balanced
P0267 Cylinder 3 injector low
P0268 High Cylinder 3 Cylinder Chain
P0269 3 cylinder is incorrectly balanced
P0270 Low Injector Circuit Indicator 4 Cylinder
P0271 High Injector Circuit Value 4 Cylinder
P0272 4 cylinder is incorrectly balanced
P0273 Low Cylinder Injector 5 Circuit Range
P0274 High Cylinder Injector 5 Circuit High
P0275 5 cylinder is incorrectly balanced
P0276 Low indicator of the chain of injector 6 cylinder
P0277 High-performance chain injector 6 cylinder
P0278 6 cylinder is incorrectly balanced
P0279 Low indicator of the chain of the cylinder 7 injector
P0280 High-performance chain injector 7 cylinder
P0281 7 cylinder is incorrectly balanced
P0282 Cylinder 8 injector low
P0283 High 8-Cylinder Injector Circuit High
P0284 8 cylinder is incorrectly balanced
P0285 Low chain indicator of cylinder 9 injector
P0286 High Cylinder Injector 9 Circuit High
P0287 9 cylinder is incorrectly balanced
P0288 Low Cylinder Injector 10 Circuit Range
P0289 High Cylinder Injector 10 Circuit High
P0290 10 cylinder is incorrectly balanced
P0291 Low chain index of cylinder 11 injector
P0292 High Cylinder Injector 11 Circuit High
P0293 11 cylinder is incorrectly balanced
P0294 Low chain index of cylinder 12 injector
P0295 High Cylinder Injector 12 Circuit High
P0296 12 cylinders are incorrectly balanced
P0300 The order of ignition of cylinders is disrupted
P0301 The order of ignition of 1 cylinder is broken
P0302 The order of ignition of 2 cylinders is broken (as an option – P031A)
P0303 The order of ignition of 3 cylinders is broken (as an option – P031B)
P0304 The order of ignition of the 4 cylinder is violated (as an option – P031C)
P0305 The order of ignition of 5 cylinder is broken
P0306 The order of ignition of 6 cylinder is broken
P0307 The order of ignition of 7 cylinder is broken
P0308 The order of ignition 8 cylinder is broken
P0309 The order of ignition of 9 cylinders is broken
P0311 The order of ignition of 11 cylinders is broken
P0312 The order of ignition12 of the cylinder is violated
P0320 Fault in the ignition distributor circuit
P0321 Invalid indicator / ignition timing switch sensor not adjusted
P0322 There is no signal from the distributor circuit of the ignition distributor
P0323 Ignition Switch Circuit Malfunction
P0325 Malfunction in chain 1 of the knock sensor (bank 1 or sensor)
P0326 Invalid indicator / not adjusted 1 knock sensor (bank 1 or sensor)
P0327 Low Detonation Sensor 1 value (bank 1 or sensor)
P0328 High detonation sensor 1 value (bank 1 or sensor)
P0329 Malfunction 1 of the knock sensor (bank 1 or sensor)
P0330 Malfunction in chain 2 of the knock sensor (bank 2)
P0331 Invalid indicator / not adjusted 2 knock sensor (bank 2)
P0332 Low reading of 2 knock sensors (bank 2)
P0333 High reading 2 of the knock sensor (bank 2)
P0334 Malfunction 2 of the knock sensor (bank 2)
P0335 Crankshaft Position Sensor A Circuit Malfunction
P0336 Invalid indicator / crankshaft position sensor A not adjusted
P0337 Crankshaft Position Sensor A Low
P0338 High reading of crankshaft position sensor A
P0339 Crankshaft Position Sensor A Malfunction
P0340 Camshaft Position Sensor Circuit Malfunction
P0341 Invalid indicator / Camshaft position sensor not adjusted
P0342 Camshaft Position Sensor Low
P0343 High Camshaft Position Sensor Signal
P0344 Camshaft Position Sensor Malfunction
P0350 Ignition Coil Primary / Secondary Circuit Malfunction
P0351 Fault in primary / secondary circuit of ignition coil A
P0352 Malfunction in primary / secondary circuit of ignition coil B
P0353 Malfunction in primary / secondary circuit of ignition coil C
P0354 Fault in primary / secondary circuit of ignition coil D
P0355 Malfunction in primary / secondary circuit of ignition coil E
P0356 Fault in primary / secondary circuit of ignition coil F
P0357 Malfunction in primary / secondary circuit of ignition coil G
P0358 Malfunction in primary / secondary circuit of ignition coil H
P0359 Malfunction in primary / secondary circuit of ignition coil I
P0360 Ignition coil primary / secondary circuit malfunction J
P0361 Malfunction in the ignition coil primary / secondary circuit K
P0362 Malfunction in the primary / secondary circuit of the ignition coil L
P0370 Timer A signal failure
P0371 The number of pulses of the timer signal A is higher than the norm
P0372 The number of pulses of the timer signal A is below the norm
P0373 Unstable signal pulses A timer
P0374 No Timer A signal pulses
P0375 Timer B Timer Error
P0376 The number of pulses of the timer B signal is higher than the norm
P0377 The number of pulses of the B timer signal is below the norm
P0378 Unstable pulses of the B timer signal
P0379 No Timed B Signals
P0380 Malfunction in circuit A of heating of a candle накаливания
P0381 Malfunction in circuit A of the glow plug indicator
P0382 Malfunction in the exhaust gas recirculation system
P0385 Malfunction in the sensor circuit B of the crankshaft position
P0386 Incorrect indicator / not adjusted crankshaft position sensor B
P0387 Low Position Sensor B Crankshaft Position
P0388 High Sensor Position B Crankshaft Position
P0389 Crankshaft Position Sensor B Malfunction
P0400 Malfunction in the exhaust gas recirculation system
P0401 Exhaust gas recirculation system too low
P0402 Exhaust gas recirculation system too high
P0403 Malfunction in the exhaust gas recirculation system
P0404 Incorrect indicator / not adjusted Exhaust gas recirculation sensor
P0405 Low Sensor A of the Exhaust Gas Recirculation
P0406 High Sensor A of Exhaust Gas Recirculation
P0407 Exhaust Gas Recirculation Sensor B Low
P0408 High Sensor B of the Exhaust Gas Recirculation
P0410 Intake Manifold Malfunction
P0411 Incorrect flow rate in intake manifold
P0412 Fault in the Intake Manifold Valve A Circuit
P0413 Intake manifold valve A open
P0414 Short ground in the intake manifold valve A circuit
P0415 Malfunction in the intake manifold valve circuit B
P0416 Intake manifold valve B open
P0417 Short ground in the intake manifold valve circuit B
P0418 Intake manifold relay A fault
P0419 Intake manifold relay B fault
P0420 Catalyst performance is too low (bank 1)
P0421 Catalyst performance is too low during warm-up (bank 1)
P0422 Catalyst performance is too low (bank 1)
P0423 Catalyst performance is too low during warm-up (bank 1)
P0424 Catalyst temperature too low when warmed up (bank 1)
P0430 Catalyst performance is too low (bank 2)
P0431 Catalyst performance is too low during warm-up (bank 2)
P0432 Catalyst performance is too low (bank 2)
P0433 Catalyst performance is too low during warm-up (bank 2)
P0434 Catalyst temperature too low when warmed up (bank 2)
P0440 Fault in the fuel vapor emission monitoring system
P0441 The flow rate in the fuel vapor emission monitoring system is incorrectly adjusted
P0442 Small leakage in the control system for the removal of fumes of fuel
P0443 Fuel Vapor Control System Check Valve Fault
P0444 Fuel Vapor Control System Check Valve Circuit Open
P0445 Short circuit in the fuel vapor eliminator control valve circuit
P0446 Malfunction in the ventilation circuit of the fuel vapor outlet monitoring system
P0447 The ventilation circuit for the fuel vapor outlet control system is open
P0448 Short circuit in the ventilation circuit of the fuel vapor outlet monitoring system
P0449 Fault in the solenoid circuit of the fuel vapor outlet monitoring system
P0450 Fuel Vapor Pressure Monitor Pressure Sensor Fault
P0451 Invalid indicator / uncontrolled fuel pressure sensor
P0452 Low Pressure Sensor for Fuel Vapor Control System
P0453 High fuel pressure sensor monitoring system pressure gauge
P0454 Fuel vapor pressure monitor sensor malfunction
P0455 Significant leakage in the control system for the removal of fumes of fuel
P0460 Fuel Level Sensor Circuit Malfunction
P0461 Invalid indicator / fuel level sensor not adjusted
P0462 Low fuel level sensor
P0463 High Fuel Level Sensor
P0464 Fuel Level Sensor Fault
P0465 Pump Flow Sensor Circuit Malfunction
P0466 Invalid indicator / purge flow sensor not adjusted
P0467 Low Purge Flow Sensor
P0468 High Purge Flow Sensor
P0469 Purge Flow Sensor Error
P0470 Exhaust Gas Pressure Sensor Circuit Malfunction
P0471 Incorrect indicator / not adjusted exhaust gas pressure sensor
P0472 Exhaust Gas Pressure Sensor Low
P0473 High Exhaust Pressure Sensor
P0474 Exhaust Gas Pressure Sensor Fault
P0475 Exhaust Gas Control Valve Circuit Malfunction
P0476 Wrong indicator / uncontrolled exhaust gas check valve
P0477 Low Indicator for Exhaust Pressure Control Valve
P0478 High Exhaust Pressure Check Valve
P0479 Exhaust Pressure Control Valve Malfunction
P0480 Malfunction in fan circuit 1
P0481 Malfunction in fan circuit 2
P0482 Malfunction in fan circuit 3
P0483 Fan failure
P0484 Fan overload current
P0485 Fan Ground Circuit Malfunction
P0500 Speed sensor circuit fault
P0501 Invalid indicator / speed sensor not adjusted
P0502 Low speed sensor reading
P0503 High or unstable speed sensor
P0505 The idle speed is incorrectly adjusted
P0506 Idle speed below normal
P0507 Idle speed above normal
P0510 Throttle valve end fault
P0520 Oil pressure sensor circuit fault
P0521 Invalid indicator / oil pressure sensor not adjusted
P0522 Oil Pressure Sensor Low Voltage
P0523 Oil Pressure Sensor High Voltage
P0530 Air Conditioning Coolant Pressure Sensor Circuit Malfunction
P0531 Invalid indicator / the A / C coolant pressure sensor is not adjusted
P0532 Air Conditioning Coolant Pressure Sensor Low
P0533 A / C Coolant Level Sensor High
P0534 Air Conditioning Coolant Leak
P0550 Power steering pressure sensor circuit fault
P0551 Invalid indicator / the pressure sensor in the power steering has not been adjusted
P0552 Low indicator of the pressure sensor in the power steering
P0553 High indicator of the pressure sensor in the power steering
P0554 Malfunction of the power steering pressure sensor
P0560 The system voltage is incorrectly adjusted
P0561 System voltage is unstable
P0562 System Low Voltage
P0563 High Voltage System
P0565 Cruise control system activation signal malfunction
P0566 Cruise control off switch malfunction
P0567 Cruise control continuation signal failure
P0568 Cruise control system speed setting signal malfunction
P0569 Cruise control system brake signal malfunction
P0570 Cruise control system acceleration malfunction
P0571 Cruise control switch circuit A fault
P0572 Low indicator of cruise control switch A
P0573 High cruise control switch A high
P0574 Cruise control system malfunction
P0575 Cruise control system malfunction
P0576 Cruise control system malfunction
P0576 Cruise control system malfunction
P0578 Cruise control system malfunction
P0579 Cruise control system malfunction
P0580 Cruise control system malfunction
P0600 Communication failure
P0601 Control unit memory (ROM)
P0602 Programmable control unit error
P0603 Error in the permanent memory (KAM) of the control unit
P0604 Error in the memory (RAM) of the control unit
P0605 Error in the memory (ROM) of the control unit
P0606 PCM Processor Malfunction
P0608 Sensor fault VSS “A” of the control unit
P0609 Malfunction of the VSS “B” sensor of the control unit
P0620 Malfunction in the generator control circuit
P0621 Malfunction in the lamp circuit “L” of the generator
P0622 Malfunction in the “F” block of the generator
P0650 Malfunction Indicator Lamp Circuit Malfunction (MIL)
P0654 Motor RPM is incorrectly adjusted
P0655 Malfunction in the engine warm-up lamp circuit
P0656 Fuel Level Sensor Circuit Malfunction
