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P2021 Diagnostic Trouble Code Discussion for July 2011

Intake Manifold Runner Position Sensor Circuit Low (Bank 2)

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Trouble Ticket Help Requests for DTC P2021
Help Request Posted
2008 Mercedes-Benz GL320 CDI 3.0L Cuts out, MIL Lamp on VIN: 4JGBF22E98
P2021: Rail pressure monitoring VIA Pressure control valve pressure low. ... has even shut off at idle one time, If allowed to sit and "cool off" will start up and drive normal again. There is no overheating involved, cool off is what he did because he did know what else to do. Recently vehicle was in with same complaint an...
July 06, 2011