EGR Valve Module Revision Daf CF XF

Error Codes:
DEF0077 - Engine warning light The vehicle enters recovery mode P1487 EGR valve position, malfunction on the sensor P1488 EGR valve module misaligned U1573 EGR valve module position, irregular data

The EGR valve with OE code 2104972 è is a specific component for DAF diesel engines of Euro 6 generation. It is part of the exhaust gas after-treatment system and is responsible for reintroducing a portion of the burnt gases back’into the combustion chamber, reducing the combustion temperature and lowering nitrogen oxide (NOx) emissions.

This valve è is predominantly used on PACCAR MX-11 and MX-13 Euro 6 engines, installed on heavy-duty vehicles in the DAF range, including models XF 106 and CF 85/106. It is an original type spare part, produced to high quality standards to withstand the high temperatures and pressures typical of the exhaust cycle.

Technical characteristics

The DAF EGR valve 2104972 è a high-precision electromechanical module, with the following construction characteristics:

• High-strength steel body and aluminum alloy’for managing high temperatures
• Integrated electronic actuator for controlling the valve opening degree
• Flanged connections for’integration into the exhaust manifold and the EGR circuit
• Presence of a position sensor for feedback to the engine control unit
• Total weight of approximately 5–5,3 kg
• Overall volume around 15.000 cm³

L’The internal actuator receives the command from the engine control unit and regulates the flow of exhaust gases entering the’intake, contributing to compliance with Euro 6 regulations.

DIPA canò intervene to also revise this component which isì important for the proper functioning of the engine.

Functionalityà

The EGR valve plays a fundamental role in reducing harmful emissions:

• It reduces the combustion temperature by lowering the concentration of oxygen in the air-fuel mixture.
• Helps to keep NOx levels within the limits set by environmental regulations.
• Improves the’efficiency of the SCR aftertreatment system thanks to gas flow balancing.

In applications on heavy vehicles such as the DAF XF 106, the EGR valve works in synergy with other systems like the particulate filter, SCR catalyst, and NOx sensors to ensure integrated emission management.

Brand and model on which the part è is mounted.

DAF

• XF

• CF
• DAF CF 105

Its application è is limited to vehicles with an active next-generation EGR system, produced approximately from 2013 onwards.

DIPA recommends always checking compatibilityà based on the specific engine code and chassis number.

Defects and causes

The main issues that can be encountered with the EGR valve 2104972 include:

• Accumulation of soot and carbon residues: causes mechanical blockage of the valve
• Failure of the’electronic actuator: prevents proper opening/closing
• Internal corrosion due to acid condensation infiltration
• Position sensor error integrated: causes irregular operation or fault code
• Loss of sealing from gaskets: mayò generate performance drops or abnormal smokeà .

These defects lead to a reduction in’engine efficiency, increased fuel consumption, activation of the check engine light, andà recovery mode, especially during use in urban conditions or partial load.

Any associated DTC codes

• DEF0077 - Check engine light On The vehicle enters recovery mode.à .
• P1487 EGR valve position, malfunction on the sensor.
• P1488 EGR valve module misaligned.
• U1573 EGR valve module position, irregular data.

Final conclusions

The EGR valve with OE code 2104972 is a fundamental component for emission control in PACCAR Euro 6 engines installed in DAF XF and CF vehicles. Its function è is critical for compliance with environmental regulations, but è it is subject to wear and malfunctions due to harsh operating conditions.

DIPA supports customers even in the after-sales phase. Itò can intervene to overhaul these components and restore them to full functionality,àresulting in cost savings on replacements and a benefit for the’environment thanks to’circular economy.