P20E9 (DCU) - Reductant Pressure Too High
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DTC DESCRIPTION P20E9 (DCU) - REDUCTANT PRESSURE TOO HIGH
| Description: The reductant dosage control module continuously monitors selective catalytic reduction (SCR) system pressure during closed-loop operation. This DTC sets when the system pressure exceeds 650 kPa (88 psi) for 10 seconds, or 790 kPa (115 psi) for 1 second. | |||
Possible Causes:
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| Diagnostic Aids: The presence of this DTC may indicate the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument panel cluster (IPC) message center. | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST RG . | ||