What is the cause of rail pressure fault 523613-2?
1 Answers
Rail pressure fault 523613-2 is a fault code reported when the fuel quantity used by the metering unit to compensate for leakage exceeds the set range. The following are the causes of this fault: 1. Excessive return oil: Excessive return oil from the injector causes high-pressure leakage, which leads to the flow rate in the metering unit exceeding the upper limit. 2. Wear of the pressure relief valve seat surface: Wear of the pressure relief valve seat surface on the fuel rail causes high-pressure leakage, which leads to the flow rate in the metering unit exceeding the upper limit. 3. Improper assembly of the high-pressure push rod: For four-valve injectors with a split high-pressure push rod, improper assembly of the high-pressure push rod can also cause excessive leakage and report this fault. 4. Blockage of the oil inlet hole: If the injector nozzle seat surface is stuck or the oil inlet hole on the side of the valve seat is blocked by particles, it will cause continuous injection, and this fault will also be reported.