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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.

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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 »
Recall Notice Icon
Severity Icon 8/10

Error Icon P0014

Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)

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Severity Icon 7/10

Error Icon P0010

Intake Camshaft Position Actuator Circuit / Open (Bank 1)

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Severity Icon 7/10

Error Icon P0013

Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)

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Severity Icon 9/10

Error Icon P0299

Turbo / Super Charger Underboost

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Severity Icon 5/10

Error Icon P0172

System Too Rich (Bank 1)

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Severity Icon 7/10

Error Icon P0171

System Too Lean (Bank 1)

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Severity Icon 9/10

Error Icon P0011

Intake Camshaft Position Timing - Over-Advanced (Bank 1)

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Severity Icon 9/10

Error Icon P0300

Random/Multiple Cylinder Misfire Detected

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Severity Icon 4/10

Error Icon P0128

Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)

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Severity Icon 7/10

Error Icon P0420

Catalyst System Efficiency Below Threshold (Bank 1)

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Error Icon P069e

Fuel Pump Control Module Requested MIL Illumination

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Severity Icon 8/10

Error Icon P0089

Fuel Pressure Regulator Performance

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Severity Icon 6/10

Error Icon P0138

O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)

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Severity Icon 3/10

Error Icon P0442

Evaporative Emission Control System Leak Detected

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Severity Icon 3/10

Error Icon P0446

Evaporative Emission Control System Vent Control Circuit Malfunction

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Severity Icon 8/10

Error Icon P0303

Cylinder 3 Misfire Detected

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Severity Icon 3/10

Error Icon P0440

Evaporative Emission Control System Malfunction

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Error Icon P0410

Secondary Air Injection System Malfunction

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Severity Icon 4/10

Error Icon P0455

System Gross Leak Evaporative Emission

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Severity Icon 9/10

Error Icon P2135

Throttle/Pedal Position Sensor/Switch A / B Voltage Correlation

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Severity Icon 8/10

Error Icon P0016

Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A

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Severity Icon 8/10

Error Icon P0776

Pressure Control Solenoid B Performance or Stuck off

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Error Icon P1101

MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER Aborted

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Error Icon P1811

Maximum Adaptive & Long Term Shift

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Error Icon P1404

IAT - B Circuit Malfunction/ Exhaust Gas Recirculation Closed Position Performance

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Error Icon P1133

HO2S Insufficient Switching Sensor 1

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Error Icon P1125

Accelerator/Throttle Pedal Position Sensor Fault

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Severity Icon 9/10

Error Icon P2138

Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation

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Severity Icon 8/10

Error Icon P0017

Crankshaft Position Camshaft Position Correlation Bank 1 Sensor B

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Severity Icon 3/10

Error Icon P2099

Post Catalyst Fuel Trim System Too Rich Bank 2

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Error Icon U0140

Lost Communication With Body Control Module

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Error Icon P0108

Manifold Absolute Pressure/Barometric Pressure Circuit High Input

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Severity Icon 8/10

Error Icon P0106

Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

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Severity Icon 3/10

Error Icon P0496

Evaporative Emission System High Purge Flow

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Error Icon P0024

Camshaft Position B - Timing Over-Advanced or System Performance (Bank 2)

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Error Icon P0008

Engine Position System Performance - Bank 1

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Error Icon P1467

A/C Compressor Temperature Sensor Malfunction

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Error Icon P1626

Theft Deterrent Fuel Enable Signal Not Received/ B+ Supply To VCRM A/C Circuit Malfunction

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Severity Icon 9/10

Error Icon P0012

Intake Camshaft Position Timing - Over-Retarded (Bank 1)

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Severity Icon 4/10

Error Icon P0036

Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2

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Severity Icon 4/10

Error Icon P0102

Mass or Volume Air Flow Circuit Low Voltage Input

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Severity Icon 8/10

Error Icon P0113

Intake Air Temperature Circuit High Input

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Severity Icon 6/10

Error Icon P0131

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)

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Severity Icon 7/10

Error Icon P0134

O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

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Severity Icon 6/10

Error Icon P0135

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

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Severity Icon 4/10

Error Icon P0137

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)

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Severity Icon 6/10

Error Icon P0141

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

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Severity Icon 5/10

Error Icon P0175

System Too Rich (Bank 2)

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Severity Icon 8/10

Error Icon P0301

Cylinder 1 Misfire Detected

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Severity Icon 8/10

Error Icon P0302

Cylinder 2 Misfire Detected

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Severity Icon 8/10

Error Icon P0304

Cylinder 4 Misfire Detected

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Severity Icon 8/10

Error Icon P0305

Cylinder 5 Misfire Detected

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Severity Icon 8/10

Error Icon P0306

Cylinder 6 Misfire Detected

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Severity Icon 3/10

Error Icon P0325

Knock Sensor 1 Circuit (Bank 2 or Single Sensor)

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Severity Icon 8/10

Error Icon P0332

Knock Sensor 2 Circuit Low Input (Bank 2)

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Severity Icon 8/10

Error Icon P0335

Crankshaft Position Sensor A Circuit Malfunction

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Severity Icon 6/10

Error Icon P0341

Camshaft Position Sensor Circuit Range/Performance

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Severity Icon 7/10

Error Icon P0401

Exhaust Gas Recirculation Flow Insufficient Detected

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Severity Icon 7/10

Error Icon P0430

Catalyst System Efficiency Below Threshold (Bank 2)

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Severity Icon 3/10

Error Icon P0441

Evaporative Emission Control System Incorrect Purge flow

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Severity Icon 4/10

Error Icon P0449

Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

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Severity Icon 3/10

Error Icon P0456

Evaporative Emissions System Small Leak Detected

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Severity Icon 5/10

Error Icon P0463

Fuel Level Sensor Circuit High Input

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Severity Icon 3/10

Error Icon P0507

Idle Control System RPM higher Than Expected

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Severity Icon 9/10

Error Icon P0700

Transmission Control System Malfunction

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Severity Icon 7/10

Error Icon P2096

Post Catalyst Fuel Trim System Too Lean Bank 1

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Severity Icon 6/10

Error Icon P2097

Post Catalyst Fuel Trim System Too Rich Bank 1

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Severity Icon 7/10

Error Icon P219A

Bank 1 Air/Fuel Ratio Imbalance

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Buick Regal Image

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.