Buick Regal Fault Codes
You can find common Buick Regal fault codes on this page that when clicked take you to a detailed description.
You can also type in the fault code you are getting below to find a more detailed description.
Search Buick Regal Codes
Do you know the fault code already? Enter it in the box below and hit "Search Codes".
Buick Regal Recalls
When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.
You can check to see if your Buick Regal has any recall notices on our sister site AutoRecalls.co, sorted by model year.View Buick Regal Recalls »
Common Regal Fault Codes
These are the most common Regal fault codes that people are searching for.
Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Intake Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Turbo / Super Charger UnderboostLearn More Fixes
System Too Rich (Bank 1)Learn More Fixes
System Too Lean (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Random/Multiple Cylinder Misfire DetectedLearn More Fixes
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)Learn More Fixes
Catalyst System Efficiency Below Threshold (Bank 1)Learn More Fixes
Fuel Pump Control Module Requested MIL IlluminationLearn More
Fuel Pressure Regulator PerformanceLearn More Fixes
O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)Learn More Fixes
Evaporative Emission Control System Leak DetectedLearn More Fixes
Evaporative Emission Control System Vent Control Circuit MalfunctionLearn More Fixes
Cylinder 3 Misfire DetectedLearn More Fixes
Evaporative Emission Control System MalfunctionLearn More Fixes
Secondary Air Injection System MalfunctionLearn More
System Gross Leak Evaporative EmissionLearn More Fixes
Throttle/Pedal Position Sensor/Switch A / B Voltage CorrelationLearn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor ALearn More Fixes
Pressure Control Solenoid B Performance or Stuck offLearn More Fixes
MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER AbortedLearn More
Maximum Adaptive & Long Term ShiftLearn More
IAT - B Circuit Malfunction/ Exhaust Gas Recirculation Closed Position PerformanceLearn More
HO2S Insufficient Switching Sensor 1Learn More
Accelerator/Throttle Pedal Position Sensor FaultLearn More
Throttle/Pedal Position Sensor/Switch D/E Voltage CorrelationLearn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor BLearn More Fixes
Post Catalyst Fuel Trim System Too Rich Bank 2Learn More Fixes
Lost Communication With Body Control ModuleLearn More
Manifold Absolute Pressure/Barometric Pressure Circuit High InputLearn More
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance ProblemLearn More Fixes
Evaporative Emission System High Purge FlowLearn More Fixes
Camshaft Position B - Timing Over-Advanced or System Performance (Bank 2)Learn More
Engine Position System Performance - Bank 1Learn More
A/C Compressor Temperature Sensor MalfunctionLearn More
Theft Deterrent Fuel Enable Signal Not Received/ B+ Supply To VCRM A/C Circuit MalfunctionLearn More
Intake Camshaft Position Timing - Over-Retarded (Bank 1)Learn 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
Intake Air Temperature Circuit High InputLearn 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 Heater Circuit Malfunction (Bank 1 Sensor 2)Learn More Fixes
System Too Rich (Bank 2)Learn More Fixes
Cylinder 1 Misfire DetectedLearn More Fixes
Cylinder 2 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 2)Learn More Fixes
Evaporative Emission Control System Incorrect Purge flowLearn More Fixes
Evaporative Emission Control System Vent Valve/Solenoid Circuit MalfunctionLearn More Fixes
Evaporative Emissions System Small Leak DetectedLearn More Fixes
Fuel Level Sensor Circuit High InputLearn 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
Bank 1 Air/Fuel Ratio ImbalanceLearn More Fixes
- Manufacturer: Buick
About the Regal
The Regal first made its debut as a sub-brand of the Buick Century in 1973. It was later converted to the Regal nameplate just three years later.
During its time on the market, a total of six generations hit the North American and Chinese markets. However, the North American variant was discontinued in 2020. Upon its discontinuation, Buick’s lineup became entirely made up of SUV offerings.
During its later years, the Regal went up against the Acura LTX, Ford Fusion, and Nissan Maxima, to name a few competitors.
Unfortunately for owners, the most common issues for the model are fairly serious ones. In fact, the top three fault codes are all related to the camshafts and their components.
Fault code P0014 is the most commonly reported of these. This code indicates that the exhaust camshaft is over-advanced and the onboard computer cannot fix it by itself.
This code can be caused by a number of things besides an actual timing issue. Some relatively simple fixes can be replacing the exhaust camshaft position sensor or replacing the engine oil with the correct type.
However, the next most common code can also help pinpoint the issue. Fault code P0013 indicates that the exhaust camshaft actuator solenoid is malfunctioning.
If both of these codes are logged together, replacing the solenoid can be the fix for both. This issue is actually covered by a special warranty for 2014 models fitted with the 2.0L turbocharged engine because it is a known issue for that engine.
Over to the intake camshaft, fault code P0010 is also a commonly reported problem. This code is the same as the previous one but for the intake camshaft.
Again, it is important to check both the intake camshaft solenoid and its circuit for any issues.