Alfa Romeo Fault Codes
On this page you can find the meaning of the fault code you may be seeing coming from your Alfa Romeo.
Either choose your model from below or scroll down even further to search and see popular fault codes across all Alfa Romeos.
Alfa Romeo Models
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Popular Alfa Romeo Fault Codes
These are the most popular Alfa Romeo fault codes that people are searching for.
Fuel Pump Secondary Circuit MalfunctionLearn More
Transmission Transfer Case Contact Plate 'B' Circuit FailureLearn More
Fuel Pressure Regulator Control Circuit LowLearn More
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor ALearn More Fixes
Random/Multiple Cylinder Misfire DetectedLearn More Fixes
Diesel Particulate Filter Efficiency Below Threshold Bank 1Learn More
Camshaft Position Sensor Circuit MalfunctionLearn More Fixes
Turbocharger Boost Sensor A Circuit HighLearn More
Mass or Volume Air flow Circuit Range/Performance ProblemLearn More Fixes
Injector Circuit Open / Shorted - Cylinder #6Learn More Fixes
Intake Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Retarded (Bank 1)Learn More Fixes
Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor BLearn More Fixes
Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2Learn More Fixes
Mass or Volume Air Flow Circuit Low Voltage InputLearn More Fixes
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance ProblemLearn More Fixes
Intake Air Temperature Circuit High InputLearn More Fixes
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)Learn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)Learn More Fixes
System Too Lean (Bank 1)Learn More Fixes
System Too Rich (Bank 1)Learn More Fixes
System Too Rich (Bank 2)Learn More Fixes
Cylinder 1 Misfire DetectedLearn More Fixes
Cylinder 2 Misfire DetectedLearn More Fixes
Cylinder 3 Misfire DetectedLearn More Fixes
Cylinder 4 Misfire DetectedLearn More Fixes
Cylinder 5 Misfire DetectedLearn More Fixes
Cylinder 6 Misfire DetectedLearn More Fixes
Knock Sensor 1 Circuit (Bank 2 or Single Sensor)Learn More Fixes
Knock Sensor 2 Circuit Low Input (Bank 2)Learn More Fixes
Crankshaft Position Sensor A Circuit MalfunctionLearn More Fixes
Camshaft Position Sensor Circuit Range/PerformanceLearn More Fixes
Exhaust Gas Recirculation Flow Insufficient DetectedLearn More Fixes
Catalyst System Efficiency Below Threshold (Bank 1)Learn More Fixes
Catalyst System Efficiency Below Threshold (Bank 2)Learn More Fixes
Evaporative Emission Control System Incorrect Purge flowLearn More Fixes
Evaporative Emission Control System Leak DetectedLearn More Fixes
Evaporative Emission Control System Vent Control Circuit MalfunctionLearn More Fixes
Evaporative Emission Control System Vent Valve/Solenoid Circuit MalfunctionLearn More Fixes
System Gross Leak Evaporative EmissionLearn More Fixes
Evaporative Emissions System Small Leak DetectedLearn More Fixes
Fuel Level Sensor Circuit High InputLearn More Fixes
Evaporative Emission System High Purge FlowLearn More Fixes
Idle Control System RPM higher Than ExpectedLearn More Fixes
Transmission Control System MalfunctionLearn More Fixes
Post Catalyst Fuel Trim System Too Lean Bank 1Learn More Fixes
Post Catalyst Fuel Trim System Too Rich Bank 1Learn More Fixes
Throttle/Pedal Position Sensor/Switch A / B Voltage CorrelationLearn More Fixes
Throttle/Pedal Position Sensor/Switch D/E Voltage CorrelationLearn More Fixes
Bank 1 Air/Fuel Ratio ImbalanceLearn More Fixes
Alfa Romeo is an Italian automobile brand that focuses mainly on sporty luxurious models. They are owned by Fiat which is part of the Stellantis group so you could see the same technology and fault codes appearing between these brands.
On this page, you can find the common fault codes associated with Alfa Romeo and the information you need to help you choose your next steps.
Some of the most common Alfa Romeo error codes that we have found include the P1238. This error code can mean different things across different manufacturers but for this one, it signals a “Fuel Pump Secondary Circuit Malfunction” problem. Although the issue may not actually be in the fuel pump itself but towards the injectors which are the next step along the journey for the fuel.
We also see a lot of people searching for the P1850 fault code that is related to a sensor inside of the transmission. This sensor keeps track of the position of the gear selector and tells the ECU when the car is in neutral.
Another common fault is the “Fuel Pressure Regulator Control Circuit Low” which is represented by the P0091 code. When you see this come up on an OBD2 reader then the Alfa Romeo that it is plugged into is most likely experiencing a low fuel pressure and could be running rough and most likely lacking power – making it harder to start from cold.
- Models: 7