If your Volvo truck is showing warning lights related to emissions or DEF fluid, the DEF head unit could be the source. The DEF Head Unit plays a key role in managing diesel exhaust fluid levels, quality, and temperature. The Volvo DEF Head Unit, OEM ASPVM-570, is designed to deliver accurate readings to the system’s control module, ensuring compliance with emissions standards and preventing costly downtime.
Symptoms That May Indicate a Faulty DEF Head Unit (OEM ASPVM-570):
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Inaccurate DEF Level Readings
The unit may report low DEF levels even when the tank is full. -
Frequent Check Engine or DEF Warning Lights
Alerts may appear due to communication errors or sensor failure. -
Unexpected Limp Mode Activation
A faulty unit can send incorrect data, triggering reduced engine power. -
Slow or No DEF System Response
Delayed sensor readings can interfere with SCR system timing. -
Inconsistent DEF Fluid Temperature Readings
Can lead to improper DEF dosing and fault codes.
When your emissions system depends on accurate data, a reliable DEF head unit is critical. The Volvo OEM ASPVM-570 offers trusted compatibility and dependable function for Volvo diesel applications. If you’re experiencing DEF-related issues, replacing the DEF head unit with a quality OEM option from Tamerx Diesel Parts can restore system accuracy and help avoid unnecessary repairs.
