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Mercedes Benz A-Class Fault Codes


You can find common Mercedes Benz A-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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Mercedes Benz A-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 A-Class has any recall notices on our sister site AutoRecalls.co, sorted by model year.

View Mercedes Benz A-Class Recalls »
Recall Notice Icon

Error Icon P0201

Injector Circuit Malfunction - Cylinder 1

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Severity Icon 8/10

Error Icon P0335

Crankshaft Position Sensor A Circuit Malfunction

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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 P0100

Mass or Volume Air flow Circuit Malfunction

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Severity Icon 9/10

Error Icon P0700

Transmission Control System Malfunction

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Error Icon P0600

Serial Communication Link Malfunction

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Severity Icon 7/10

Error Icon P0401

Exhaust Gas Recirculation Flow Insufficient Detected

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Severity Icon 8/10

Error Icon P0170

Fuel Trim Malfunction (Bank 1)

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Severity Icon 8/10

Error Icon P0302

Cylinder 2 Misfire Detected

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Severity Icon 7/10

Error Icon P0420

Catalyst System Efficiency Below Threshold (Bank 1)

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Severity Icon 3/10

Error Icon P0456

Evaporative Emissions System Small Leak Detected

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Severity Icon 7/10

Error Icon P0171

System Too Lean (Bank 1)

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Severity Icon 7/10

Error Icon P0380

Glow Plug/Heater Circuit A Malfunction More details...

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Severity Icon 5/10

Error Icon P0172

System Too Rich (Bank 1)

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Error Icon P0599

Thermostat Heater Control Circuit High

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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 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 P0455

System Gross Leak Evaporative Emission

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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 9/10

Error Icon P0299

Turbo / Super Charger Underboost

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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 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 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 P0303

Cylinder 3 Misfire Detected

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Severity Icon 8/10

Error Icon P0304

Cylinder 4 Misfire Detected

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Mercedes Benz A-Class Image

About the A-Class

The A-Class first entered the market as a subcompact in 1997. It later pivoted into the subcompact executive class in 2013. This huge change in terms of styling was done to allow the model to compete with the emerging popularity of the subcompact executive class.

Rivals in the class include the BMW 1 Series, Audi A3 Sportback, and Ford Focus, among many others.

There have been four generations of the A-Class to hit the markets, with the latest making its debut in 2018. Although, it is hard to consider the first and second generations as the same model as today’s offering.

The most common problem owner’s have reported is fault code P0201, which represents a malfunction with the fuel injector for the first cylinder. This has caused owner’s a host of driveability issues, including misfires.

Of course, one of the most likely causes is a faulty fuel injector for the first cylinder. However, it is typically logged with the same code for the other cylinders. This can indicate the problem is somewhere upstream in the fuel system, which can mean there are faulty components responsible for supplying and pressurizing the fuel.

Another fairly common issue is P0335, which indicates that there is a problem with the crankshaft position sensor. Owners have reported that a faulty crankshaft position sensor is one of the most likely causes, but faults in the sensor’s circuit can also be the culprit.

The A-Class is also somewhat known to suffer from P0068, which represents an issue with the signal from the mass airflow (MAF) sensor, manifold absolute pressure (MAP) sensor, and throttle position sensor.

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