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Mercedes Benz B-Class Fault Codes


You can find common Mercedes Benz B-Class 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".

Mercedes Benz B-Class 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 Mercedes Benz B-Class has any recall notices on our sister site AutoRecalls.co, sorted by model year.

View Mercedes Benz B-Class Recalls ยป
Recall Notice Icon
Severity Icon 9/10

Error Icon P0299

Turbo / Super Charger Underboost

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Error Icon P0793

Intermediate Shaft Speed Sensor Circuit No signal

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Severity Icon 8/10

Error Icon P0068

MAP / MAF - Throttle Position Correlation

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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 P0171

System Too Lean (Bank 1)

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Severity Icon 4/10

Error Icon P0455

System Gross Leak Evaporative Emission

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Severity Icon 8/10

Error Icon P0017

Crankshaft Position Camshaft Position Correlation Bank 1 Sensor B

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Error Icon P1570

Contr. Module Locked

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Error Icon P2006

Intake Manifold Runner Control Stuck Closed Bank 1

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Severity Icon 4/10

Error Icon P0128

Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)

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Error Icon P2463

Diesel Particulate Filter Restriction - Soot Accumulation

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Error Icon P0410

Secondary Air Injection System Malfunction

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Error Icon P0730

Incorrect Gear Ratio

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Severity Icon 9/10

Error Icon P0300

Random/Multiple Cylinder Misfire Detected

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Error Icon C1140

Hydraulic Base Brake Failure

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Error Icon C1102

ABS Acceleration Switch Circuit Failure

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Error Icon C1210

ABS Outlet Valve Coil RF Circuit Failure

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Error Icon C1101

ABS Hydraulic Valve Circuit Failure

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Error Icon C1170

PRNDL Switch Circuit Failure

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Severity Icon 5/10

Error Icon P0705

Transmission Range Sensor Circuit Malfunction (PRNDL Input)

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Severity Icon 7/10

Error Icon U0155

Lost Communication With Instrument Panel Cluster (IPC) Control Module

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Error Icon U0121

Lost Communication With Anti-Lock Brake System (ABS) Control Module

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Severity Icon 9/10

Error Icon U0073

Control Module Communication Bus "A" Off

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Severity Icon 8/10

Error Icon U0106

Lost Communication With Glow Plug Control Module

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Error Icon U0101

Lost Communication with TCM

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Error Icon P1519

Intake Manifold Runner Control (Stuck Closed)

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Error Icon P1831

Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Ground

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Error Icon P1190

Calibration Resistor Out Of Range

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Error Icon P1886

4X4 Initialization Failure

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Error Icon P1650

PSP Switch Out of Self Test Range

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Error Icon P1858

Transmission Transfer Case Contact Plate 'D' Circuit Failure

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Error Icon P1840

Transmission Transfer Case Shift Motor Short Circuit To Battery

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Error Icon P1868

Transmission Automatic 4-Wheel Drive Indicator (Lamp) Circuit Failure

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Error Icon P1872

Transmission Mechanical 4-Wheel Drive Axle Lock Lamp Circuit Failure

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Error Icon P1405

DPFE Sensor Upstream Hose Off Or Plugged

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Error Icon P1408

EGR Flow Out Of Self Test Range

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Error Icon P1105

Dual Alternator Upper Fault

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Error Icon P1189

Pump Speed Signal Fault

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Error Icon P1636

Inductive Signature Chip Communication Error

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Error Icon P1400

DPFE Circuit Low Input

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Error Icon P1453

Fuel Tank Pressure Relief Valve Malfunction

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Error Icon P1482

SCP

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Error Icon P1481

GLOW PLUG FAILURE

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Error Icon P1222

Traction Control Output Circuit Malfunction

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Error Icon P1354

Ignition Coil C Primary Circuit Malfunction

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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 9/10

Error Icon P0011

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

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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 7/10

Error Icon P0013

Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)

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Severity Icon 8/10

Error Icon P0014

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

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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 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 P0106

Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

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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 P0138

O2 Sensor Circuit High 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 P0172

System Too Rich (Bank 1)

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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 P0303

Cylinder 3 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 P0420

Catalyst System Efficiency Below Threshold (Bank 1)

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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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Mercedes Benz B-Class Image

About the B-Class

The B-Class was first released in 2005 as a subcompact executive minivan. The model was based heavily on the first two generations of the Mercedes A-Class, before it changed classes in the third generation.

Because of its focus on the premium, rivals are somewhat few. The BMW 2 Series Active/ Gran Tourer and Renault Scenic are some of the main competitors that come to mind.

Mercedes offers a range of petrol engines, as well as a single turbocharged diesel. Unfortunately, almost all of these are turbocharged, which is one of the most problematic systems for the B-Class.

Fault code P0299 is among the most searched issues for the model, indicating an underboost condition from the turbocharger.

One of the main causes for this issue on this model is a faulty boost pressure control flap. Another fairly common cause is a loose or damaged wastegate vacuum hose.

Another fairly common problem for the model is represented by fault code P0793. This code indicates a problem with the intermediate shaft speed sensor circuit.

This issue has been reported to make the B-Class behave very erratically. This can include shifting problems, reduced power, and false speedometer readings. According to a number of owners, a faulty transmission is usually the culprit for this issue.

Another fairly common issue for both Mercedes-Benz models and the B-Class is P0068. This code represents an issue between the mass airflow (MAF) sensor, manifold absolute pressure (MAP) sensor, and throttle position sensor.

All three of these sensors need to be carefully in alignment with one another. If any of these sensors become faulty, it can result in this and other codes being logged.

Owners have reported that faulty sensors are one of the most common causes for the issue, which can be a simple fix.