Possible Causes
- Purpose of the DTC
- To monitor for diesel exhaust fluid line under pressure error
- Electrical Cause
- Mechanical Cause
- Control Module Signal Name
- Monitor Description
- If modeled pressure falls below 4.5 bar the system is purged and pressure is built up again. If this occurs during a drive cycle the error is set
- Prioritized List of Possible Causes
- The powertrain control module has determined failures where some circuit quantity, reported via serial data, is above a specified range
- DEF injector dosing too high. Diesel Exhaust Fluid injection pump delivers too much DEF
- Diesel exhaust fluid line leakage
- Diesel exhaust fluid line air bubbles
- Diesel exhaust fluid tank module circuit short circuit to ground, short circuit to power, open circuit, high resistance
- Connector is disconnected, connector pin is backed out, connector pin corrosion