Mercedes Benz CLA Fault Codes
You can find common Mercedes Benz CLA 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.
Jump To:Search Mercedes Benz CLA Codes Mercedes Benz CLA Recall Notices Common Mercedes Benz CLA Codes
Search Mercedes Benz CLA Codes
Do you know the fault code already? Enter it in the box below and hit "Search Codes".
Mercedes Benz CLA 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 CLA has any recall notices on our sister site AutoRecalls.co, sorted by model year.View Mercedes Benz CLA Recalls »
Common CLA Fault Codes
These are the most common CLA fault codes that people are searching for.
Turbo / Super Charger UnderboostLearn More Fixes
Cylinder 1 Misfire DetectedLearn More Fixes
System Too Rich (Bank 2)Learn More Fixes
System Too Lean (Bank 1)Learn More Fixes
Evaporative Emissions System Small Leak DetectedLearn More Fixes
System Too Lean (Bank 2)Learn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor BLearn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor ALearn More Fixes
Exhaust Camshaft Position Timing - Over-Retarded (Bank 1)Learn More
Intake Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Random/Multiple Cylinder Misfire DetectedLearn More Fixes
Misfire Detected with Low FuelLearn More
Thermostat Heater Control Circuit HighLearn More
Incorrect Immobilizer KeyLearn More
Engine Oil Pressure Sensor/Switch Range/PerformanceLearn More
Key Line VoltageLearn More
System Too Lean at Idle DTCLearn More Fixes
Intake Manifold Runner Control Stuck Closed Bank 1Learn More
System Gross Leak Evaporative EmissionLearn More Fixes
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)Learn More Fixes
Diesel Particulate Filter Restriction - Soot AccumulationLearn More
Secondary Air Injection System MalfunctionLearn More
Incorrect Gear RatioLearn More
Hydraulic Base Brake FailureLearn More
ABS Acceleration Switch Circuit FailureLearn More
ABS Outlet Valve Coil RF Circuit FailureLearn More
ABS Hydraulic Valve Circuit FailureLearn More
PRNDL Switch Circuit FailureLearn More
Transmission Range Sensor Circuit Malfunction (PRNDL Input)Learn More Fixes
Lost Communication With Instrument Panel Cluster (IPC) Control ModuleLearn More Fixes
Lost Communication With Anti-Lock Brake System (ABS) Control ModuleLearn More
Control Module Communication Bus "A" OffLearn More Fixes
Lost Communication With Glow Plug Control ModuleLearn More Fixes
Lost Communication with TCMLearn More
Contr. Module LockedLearn More
Intake Manifold Runner Control (Stuck Closed)Learn More
Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To GroundLearn More
Calibration Resistor Out Of RangeLearn More
4X4 Initialization FailureLearn More
PSP Switch Out of Self Test RangeLearn More
Transmission Transfer Case Contact Plate 'D' Circuit FailureLearn More
Transmission Transfer Case Shift Motor Short Circuit To BatteryLearn More
Transmission Automatic 4-Wheel Drive Indicator (Lamp) Circuit FailureLearn More
Transmission Mechanical 4-Wheel Drive Axle Lock Lamp Circuit FailureLearn More
DPFE Sensor Upstream Hose Off Or PluggedLearn More
EGR Flow Out Of Self Test RangeLearn More
Dual Alternator Upper FaultLearn More
Pump Speed Signal FaultLearn More
Inductive Signature Chip Communication ErrorLearn More
DPFE Circuit Low InputLearn More
Fuel Tank Pressure Relief Valve MalfunctionLearn More
GLOW PLUG FAILURELearn More
Traction Control Output Circuit MalfunctionLearn More
Ignition Coil C Primary Circuit MalfunctionLearn More
Intake Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Retarded (Bank 1)Learn More Fixes
Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Exhaust Camshaft Position Timing - Over-Advanced (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
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance ProblemLearn 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 Circuit High Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)Learn More Fixes
System Too Rich (Bank 1)Learn More Fixes
Cylinder 2 Misfire DetectedLearn More Fixes
Cylinder 3 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
- Manufacturer: Mercedes Benz
About the CLA
The CLA was first released in 2013 as a series of compact luxury cars. Both a 4-door sedan and a 5-door station wagon, called the Shooting Brake, have been sold.
Like with many of the Mercedes-Benz offerings, it is sold as a performance version as well. This is called the CLA 45 AMG Edition. There have been a number of other variants sold over the years. There have also been two generations to hit the markets since its release.
Competition comes mainly from Mercedes-Benz’s main rivals, the Audi TT Coupe and BMW 2 Series. Another similar model is the Volkswagen Arteon.
To provide the desired performance, all CLA models, both diesel and petrol, are outfitted with turbocharger systems.
This is one of the main issues that owners have reported for the model. Fault code P0299 represents an underboost condition from the turbocharger. Loose hoses in the turbocharger system, a faulty boost pressure sensor, and a defective wastegate actuator have all been attributed to being the cause for this issue.
Another fairly common issue for the model is P0301, which represents a misfire from the first cylinder.
Lack of proper maintenance is one of the primary causes for misfires in Mercedes engines. Fouled spark plugs can easily be replaced, fixing the issue though. However, anything that can upset the ideal air-fuel mixture or the ignition source for cylinder one can be the cause of a misfire.
Unfortunately, both of these codes are fairly serious problems. They can cause significant issues when it comes to performance, such as putting the CLA into limp mode. In some cases, the symptoms will be very mild, but it is still best to have these codes resolved as soon as possible to protect the car.