Scania Truck Fault Codes List (PDF). DTC

This page contains a detailed list of diagnostic trouble codes (DTCs) for Scania trucks. The guide covers all major engine systems, including the fuel system, electronic control unit (ECU), turbocharging, exhaust gas recirculation (EGR), cooling and injection systems. Each error code is accompanied by a description of the fault, possible causes and recommended solutions. The information is useful for quick diagnosis and effective repair of Scania engines of the DC09, DC13, DC16 series and other models. Ideal for workshops, diagnosticians and technicians.

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⚠️ 1. EEC 1 error (DTC: P20EE - Inefficient operation of the SCR catalytic converter)

Causes:

• Poor quality AdBlue liquid
• Clogged catalytic converter
• Failure of the NOx sensor

Remedy:

• Replace AdBlue with certified liquid
• Clean or replace the catalytic converter
• Check and replace NOx sensors

⚠️ 2. EBS (electronic braking system) error

Causes:

• Damaged ABS sensor on the wheels
• Oxidation or breakage of the wiring
• Problems in the EBS module

Remedy:

• Check the wheel speed sensors and their connectors
• Test the wiring with a multimeter
• If necessary, reflash or replace the EBS unit

⚠️ 3. EMS (engine management system) error - DTC: P0340 (sensor error camshaft)

Causes:

• Damage to the sensor itself
• Violation of the signal circuit
• Problems in the ECU

Remedy:

• Replace the camshaft sensor
• Check the integrity of the wires and connectors
• Adapt the ECU after replacement

⚠️ 4. Error in the fuel supply system (low pressure)

Causes:

• Clogged fuel filter
• Faulty fuel injection pump
• Air in the system

Remedy:

• Replace the fuel filter
• Check the pressure in the fuel rail
• Bleed air from the system

⚠️ 5. ELC error (electronic air suspension level control)

Causes:

• Failure of the body position sensor
• Damage to the air lines
• Air leak in the cushions or valves

Remedy:

• Diagnostics of sensors and suspension calibration
• Checking tightness of all connections
• Replacement of damaged components

⚠️ 6. Opticruise error (automated transmission module)

Causes:

• Worn clutch or actuator sensor
• Insufficient pressure in the pneumatic system
• Software failures

Remedies:

• Reading error codes and checking actuators
• Replacing faulty components
• Reflash the transmission control unit

✅ General recommendations:

• Use genuine Scania SDP3 diagnostic scanners
• Update control unit software regularly
• Follow maintenance intervals
• Keep an error log to analyze recurring problems