Bentley OBD Fault Codes

Bentley OBD 2 Fault Codes

For decades, the OBD (onboard diagnostic) system has been a standard in the car industry, helping owners and technicians alike precisely diagnose potential issues with their vehicles. 

The first OBD systems appeared in the early 70s, but were quickly overshadowed by the OBD 2 system, which became the industry standard by the mid-90s. 

Today, all vehicles use the OBD 2 system - and when it comes to Bentley auto repairs, the OBD 2 is a crucial system for proper maintenance, which is why understanding all of its components, from its fundamentals to its error codes, is therefore critical.

What Are Bentley Error Codes?

What do the Bentley OBD faults mean? 

Bentley error codes are OBD 2 diagnostic tool readings, which show potential problems with the car's engine, electrical system, and drive train. 

Modern vehicles are filled with various sensors that monitor every function, and when something is wrong, they signal to the driver through warnings on the dashboard. When a vehicle is attached to an OBD reading tool, the tool will display all of its fault codes in letter/number formats, which will then be translated and connected to a specific issue.

Why Use OBD 2?

The value of the OBD system is enormous, as it helps drivers note any potential faults in real time, keeps an eye on all systems, and prevents any major breakdowns that might occur. Additionally, it allows technicians to diagnose issues, leaving out any guesswork and making potential repairs more accessible and faster than before. 

This is especially true for prestigious and luxurious brands such as Bentley. 

Bentley cars have always been known for their advanced systems, new technologies, and luxury features, all of which make them more complicated than regular vehicles. That’s why being able to understand Bentley fault codes is essential for operating these fine cars and monitoring their condition. 

Due to the OBD's precision and thorough explanations of potential problems, it remains an integral part of Bentley's maintenance and repair processes, especially when it comes to the most common Bentley issues.

How To Check Bentley Error Codes

In order to read OBD fault codes, plug the diagnostic device into its specific OBD port and scan for the codes. On official diagnostic tools, these codes will come with an explanation, which makes it easier to read and diagnose the problem. 

bentley obd code

Modern-day technology has brought us more modern solutions when reading OBD codes, and now, with the help of a proper jack, you can plug in your smartphone and, by using some free apps, you can scan your Bentley for its fault codes. However, before doing so, it’s important to know that these free OBD apps are not exactly accurate, and can often misread codes.

For the most accurate readings, you should always use a professional Bentley fault code reader and official tools that will provide the exact fault code and explanation. 

Before scanning your Bentley for its potential fault codes, it’s essential to first understand how to find the OBD 2 port and differentiate between OBD 1 from OBD 2 systems: if you have a Bentley vehicle made between the late ‘80s and early '90s, chances are you have the OBD 1 system with a round OBD port. 

Known by Bentley as "The Master Check Connection" system, it had the same function and worked using the same principles as the standard OBD system - however, from the mid-90s onwards, all Bentley models have used the standard rectangular 8-pin OBD jack, which allows you to plug your OBD diagnostic in and connect it to your ECU in order to read your fault codes.

Meanwhile, for most modern Bentley models, the OBD 2 port is located underneath the steering wheel next to the brake pedal, and is easy to reach and connect to the reading tool. However, since thieves sometimes use the OBD 2 port to steal vehicles, some owners have relocated the port to a more secluded place. Therefore, if you are purchasing a used Bentley vehicle and can’t find the port in its usual spot, ask the owner for its location and information about why it was moved.

Bentley OBD 2 Table Of DTC

Below is an extensive list and guide to all Bentley DTC or Bentley Diagnostic Trouble Codes. Search for diagnostic trouble codes by their number, with OBD 2 Bentley code definitions displayed in an easy-to-read format.

P0010

Powertrain Control Module (PCM) failure

P0011

Camshaft variable timing solenoid failure, the Engine oil level is too low, The engine is not timed correctly; the engine oil does not meet the manufacturer's requirements

P0012

The engine is not timed correctly, The engine oil does not meet the manufacturer's requirements, Variable valve timing actuator failure, Worn timing chain

P0013

Powertrain Control Module (PCM) failure, Variable valve timing actuator failure

P0014

Camshaft variable timing solenoid failure, the Engine oil level is too low, The engine is not timed correctly, the engine oil does not meet the manufacturer's requirements, variable valve timing actuator failure, worn timing chain

P0101

Large vacuum leaks, Split Intake Air Boot or PCV Hose, Defective intake manifold gaskets, Mass Airflow Sensor (MAF), Mass Air Flow Sensor circuit and or Wiring problems

P0102

The Mass Airflow  Sensor is unplugged, the Wiring is damaged, loose or corroded electrical terminals in the Sensor circuit

P0113

Defective Intake Air Temperature Sensor, Dirty air filter, Defective Mass Air Flow Sensor, Faulty or corroded Intake Air Temperature Sensor wiring or connections

P0128

Defective Engine Thermostat, Defective Engine Coolant Temperature Sensor, Defective Intake Air Temperature Sensor

P0135

Sensor Heater Circuit, Exhaust System Leak, Intake Air System leak, Low Fuel Pressure

P0171

Control module software needs to be updated, Vacuum leaks (intake manifold gaskets, vacuum hoses, PCV hoses, etc.), Mass airflow sensor, Plugged fuel filter or weak fuel pump, Plugged or dirty fuel injectors

P0174

Plugged Fuel Filter or weak Fuel Pump, Plugged or dirty Fuel Injectors

P0200

Plugged Fuel Injector, Dirt in the Fuel Injector

P0201

Defective Fuel Injector, Faulty or corroded fuel injector, wiring, and connections

P0202

Malfunction of the Fuel Injector, Malfunction of the PCM Fuel Injector driver circuit, Defective wiring/connections in the Fuel Injector wiring harness

P0203

Fuel injector failure, Powertrain Control Module (PCM) failure, Wiring issue

P0205

Fuel injector failure, Powertrain Control Module (PCM) failure, Wiring issue

P0300

Worn out spark plugs, ignition wires, coil(s), distributor cap and rotor (when applicable), Incorrect ignition timing, Vacuum leak(s), Low or weak fuel pressure, Improperly functioning EGR system

P0301

Defective Mass Air Flow Sensor, Defective Crankshaft and Camshaft Sensor, Defective Throttle Position Sensor, Mechanical engine problems (i.e., low compression, leaking head gasket(s), or valve problems)

P0302

Worn out spark plugs, ignition wires, coil(s), distributor cap and rotor (when applicable), Incorrect ignition timing, Vacuum leak(s), Low or weak fuel pressure, Improperly functioning EGR system

P0303

Defective Mass Air Flow Sensor, Defective Crankshaft and Camshaft Sensor, Defective Throttle Position Sensor, Mechanical engine problems (i.e., low compression, leaking head gasket(s), or valve problems)

P0304

Worn out spark plugs, ignition wires, coil(s), distributor cap and rotor (when applicable), Incorrect ignition timing, Vacuum leak(s)

P0401

Restriction in the EGR passages usually caused by carbon buildup, The EGR Valve is defective, Lack of proper vacuum or electrical signal to the EGR valve, Malfunctioning EGR Vacuum supply solenoid

P0420

Inefficient Catalytic Converter(s), Defective Front or Rear Oxygen Sensor(s), Misfiring engines

P0430

Defective Catalytic Converter: Internal engine damage resulting in high oil consumption and a leaking Head Gasket has damaged the Catalytic Converter

P0440

Missing fuel cap, Defective or damaged fuel cap, Distorted or damaged Fuel Tank Filler Neck, Torn or punctured Evaporative system hose(s), Defective Fuel Tank Sending Unit gasket or seal, Split or damaged Carbon Canister

P0441

Defective Fuel Tank Sending Unit gasket or seal, Split or damaged Carbon Canister, Defective Evaporative Vent Valve, Defective or damaged fuel tank

P0442

Defective Leak Detection Pump, Slightly loose and worn clamps or hardened O-rings anywhere in the EVAP system

P0455

Split or damaged Carbon Canister, Defective Evaporative Vent Valve and Evaporative Purge Valve, Defective or damaged fuel tank, Defective Fuel Tank Pressure Sensor

P0500

Defective Vehicle Speed Sensor, Defective Speedometer, Vehicle Speed Sensor wiring or connector, Communication (CAN) bus problems, Defective transmission or differential Vehicle Speed Sensor drive gear

P0501

Defective Vehicle Speed Sensor, Defective Speedometer, Vehicle Speed Sensor wiring or connector, Communication (CAN) bus problems, Defective transmission or differential Vehicle Speed Sensor drive gear

P0505

Defective Idle Air Control Motor, Intake Manifold Vacuum leaks, Carbon buildup in the Throttle Body air passages

P0506

Defective/sticking Idle Air Control Motor, Intake Manifold Vacuum leaks, Carbon buildup in the Throttle Body air passages, Defective Power Steering Pressure Switch

P0507

Defective/sticking Idle Air Control Motor, Intake Manifold Vacuum leaks, Carbon buildup in the Throttle Body air passages, Defective Coolant Temperature Sensor, Defective Charging System/Alternator, Defective Power Steering Pressure Switch

P0600

Defective PCM (Power Train Control Module), Defective PCM data bus wiring/connections, Defective PCM data bus ground circuit(s), Defective PCM or other control module controlled output devices, Defective CAN bus communication

P0601

Lack of proper voltage to the PCM, Defective PCM memory module, Defective PCM ground circuit(s), Defective PCM controlled output devices

P0602

Powertrain Control Module (PCM) failure, Wiring issue

P0603

PCM Keep Alive Memory Module (KAM), Defective PCM ground circuit(s), Defective PCM controlled output devices

P0605

Lack of proper voltage and ground to the PCM

P0700

Defective Shift Solenoids, Defective Engine Coolant Temperature Sensor, Defective Valve Body, Dirty transmission fluid that restricts the hydraulic passages

P0705

Defective Valve Body, Defective manual shift valve linkage, Dirty transmission fluid that restricts the hydraulic passages

P0706

Defective Transmission Range Sensor (PRNDL input), Defective Transmission Range Sensor (PRNDL input) wiring or connector

P0720

Defective Output Speed Sensor, Defective Shift Solenoids, Defective Engine Coolant Temperature Sensor, Defective Valve Body, Dirty transmission fluid that restricts the hydraulic passages, Defective Output Speed Sensor wiring or connector

P0730

Defective Shift Solenoids, Defective Engine Coolant Temperature Sensor, Defective Valve Body, Dirty transmission fluid that restricts the hydraulic passages

P0841, P0842, P0845, P0846, P0847

 Transmission Control Module (TCM)

P0901

Clutch master cylinder failure, Clutch solenoid failure

P0935

Hydraulic power unit assembly failure, Transmission Control Module (TCM) failure, Wiring issue

P0942

Hydraulic power unit assembly failure, Transmission Control Module (TCM) failure, Wiring issue

P0944

Clogged transmission filter; Transmission fluid level is low, Transmission oil pump failure, Wiring issue

P0961

Transmission shift solenoid failure

P0A08

Inverter/converter assembly failure, Powertrain Control Module (PCM) failure, Wiring issue

P0A0D

High voltage safety device failure, Inverter/converter assembly failure, Power management control module failure, Service disconnect plug is not connected correctly, Wiring issue

P0A0F

Hybrid transaxle assembly failure, Internal engine failure, Power management control module failure

P0A7F

Poor connections at the HV battery, A problem with the HV battery, ECU issues

P0A80

High voltage battery assembly failure

P0B22

Battery contactor assembly failure, Battery Energy Control Module (BECM) failure

P0B24

Battery Energy Control Module (BECM) failure, High voltage battery assembly failure, Wiring issue

P0C00

Drive motor generator power inverter control module failure

P0C09

Drive motor generator assembly failure, Drive motor generator power inverter control module failure

P0C11

Coolant system leak, Drive motor generator power inverter control module failure

P0C14

Engine cooling fan failure, Water pump failure

P0C15

Coolant system leak, Drive motor generator power inverter control module failure, Engine cooling fan failure, Water pump failure

P2000

Diesel Particulate Filter (DPF) failure

P2002

Intake air leak, Mass Airflow (MAF) sensor is dirty/loss of calibration

P2004

A failed IMRC actuator, A problem with the intake manifold or linkage, Wiring issues

P2006

Intake manifold runner control actuator failure, Powertrain Control Module (PCM) failure, Restricted vacuum lines

P2101

Accelerator Pedal Position (APP) assembly failure, Powertrain Control Module (PCM) failure, Throttle control motor failure, Wiring issue

P2181

Engine coolant heater failure, the Engine coolant level is too low, Thermostat failure

P2210

Oxygen sensor failure, Powertrain Control Module (PCM) failure, Wiring issue

P2213

Powertrain Control Module (PCM) failure, Wiring issue

P2238

Exhaust leak, Oxygen sensor failure, Powertrain Control Module (PCM) failure, Wiring issue

P2301, P2302, P2238, P2304, P2138

 Intake Failure

P2505, P2455

Ignition coil failure, Powertrain Control Module (PCM) failure, Wiring issue

P2401, P2402, P2422

EVAP leak detection pump failure, Powertrain Control Module (PCM) failure, Wiring issue

P2431, P2432

Air control solenoid failure, Powertrain Control Module (PCM) failure, Secondary Air System pressure sensor failure, Wiring issue

P2500, P2501, P2502

Alternator failure, Battery failure, Wiring issue

P2503

Powertrain Control Module (PCM) failure, Powertrain Control Module (PCM) power relay failure, Wiring issue

P250C

Oil level sensor failure, Powertrain Control Module (PCM) failure, Wiring issue

P2601

Coolant Heat Storage (CHS) water pump failure, Coolant Heat Storage (CHS) water pump relay, Powertrain Control Module (PCM) failure, Wiring issue

P2607, P2607, P2609

Intake air heater, Powertrain Control Module (PCM) failure, Wiring issue

P2610

An internal PCM problem, A problem with the PCM power or ground circuit

P2614

Broken tone ring, Camshaft Position Sensor (CMP) failure, Powertrain Control Module (PCM) failure, Wiring issue

P2706

Transmission Control Module (TCM) failure, Transmission fluid level is low, Transmission shift solenoid failure, Wiring issue

P2711

Internal transmission failure, Transmission Control Module (TCM) failure, Transmission fluid level is expected, Transmission solenoid failure, Wiring issue

P2714, P2716, P2723

Transmission Control Module (TCM) failure, Transmission fluid level is low, Transmission shift solenoid failure, Wiring issue

P2803

Powertrain Control Module (PCM) failure, Transmission Control Module (TCM) failure, Transmission range sensor failure, Wiring issue

P2806

Powertrain Control Module (PCM) failure, Transmission Control Module (TCM) failure, Transmission range sensor failure, Transmission range sensor is out of adjustment, Wiring issue

P2809, P2810, P2815

Transmission Control Module (TCM) failure, Transmission fluid level is low, Transmission pressure control solenoid failure, Wiring issue

P2A00, P2A01, P2A02, P2A04

Exhaust leak, Oxygen sensor failure, Powertrain Control Module (PCM) failure, Wiring issue

P2BA8

Faulty NOx Sensors, NOx Sensors harness is open or shorted, NOx Sensors circuit poor electrical connection, Faulty Diesel Particulate Filter (DPF)

P3000

Fuel level is too low, High voltage battery assembly failure, High voltage battery is not sufficiently charged

P3100

High voltage powertrain control module failure

P3400

Faulty Cylinder Deactivation System

P3401

Engine oil level is too low, Powertrain Control Module (PCM) failure, Variable valve timing solenoid failure, Wiring issue

B0081

Wiring issues, Control module problems, problem with the airbag

C0040

A problem with the wheel speed sensor circuit, Reluctor points

U0001

A faulty wheel speed sensor, problem with the ABS module

U0073

A faulty control module, problem with the CAN bus

U0100

A faulty PCM, problem with the control module circuit, problem with the CAN bus

U0107, U0121

A dead battery, faulty TAC module, problem with the TAC module circuit, problem with the CAN bus

P3000

Fuel level is too low, High voltage battery assembly failure, High voltage battery is not sufficiently charged

P2308

Ignition coil failure, failure, Wiring issue

P2305

Powertrain Control Module (PCM) failure

P2302

Wiring Issues

P2251, P2237

Exhaust leak, Oxygen sensor failure

P0C00

Drive motor generator power inverter control module failure

P0B30, P0B28, P0B26

Battery Energy Control Module (BECM) failure, High voltage battery assembly failure, Wiring issue

FAQ about Bentley Diagnostic Trouble Codes

How Do I Find My Bentley Manufacturer-Specific Fault Code?

Finding the right Bentley OBD 2 fault code is a relatively simple task: first, plug your diagnostic device into its OBD port, and let it do its job - very soon, the diagnostic device will display codes. However, note that some cheaper devices and DIY diagnostic tools will display only code without an explanation. 

With the official Bentley diagnostic tools we have at Westminster Motors, your fault code will come with a direct explanation.

How Do You Read Bentley Fault Codes?

When your OBD diagnostic tool is connected to the OBD port of your Bentley vehicle, it will automatically deliver Bentley OBD 2 fault codes: displayed in letter/number format, these codes are then connected to the probable cause featured on the list. 

This list will tell you what is wrong with your car. However, make sure you are aware of how to distinguish between a proper fault or trouble code and an error code. 

OBD readings can sometimes display errors that are not faults, and don't represent mechanical or electrical problems - instead, these are common "hiccups" of the system. Bentley error codes often display faulty sensor readings resulting from various factors - the best example of this is when your vehicle gets its oil changed, but the system and the sensors are not reset. 

Can I Check Engine Codes Without a Scanner?

On some older Bentley models, it is possible to check fault code engine warnings without OBD diagnostic tools. 

When you notice the flashing check engine light on the dashboard, use your ignition key to turn the dashboard on but not the engine, and press the odometer reset button. The check engine light will go on, and start blinking in a sequence - this number of blinks will relate to its specific error code. However, this is not possible on modern models, especially with digital dashboards, which are in the current Bentley model range. 

What Are Diagnostic Bentley Fault Codes?

Diagnostic fault codes, or DTC - also known as trouble codes or error codes - are alphanumeric codes generated by a vehicle's onboard diagnostic (OBD) system. These codes help technicians and vehicle owners identify specific issues within the vehicle. 

OBD systems are standardized across most vehicles. The OBD system is an irreplaceable part of the modern vehicle maintenance process, and is essential in diagnosing potential issues and controlling vehicle system sensors.

The OBD system is highly beneficial, and Bentley owners must know that any error code, check engine light, or warning light must be addressed by a team of experienced technicians such as ours at Westminster Motors. 

At Westminster Motors, we can also help you with model recall, and perform all Bentley recalls - we can also provide you with links for Jaguar OBD Trouble Codes and Land Rover OBD Trouble Codes, which will help you understand potential problems and their solutions. Reach out to our team at Westminster Motors today.

Author: Avo Demirjian