Rail pressure is controlled by only RPRV or both RPRV and FPRV or only FPRV depending on engine condition. These three modes are called ‘CPC mode’. During transition from one mode to another mode, if rail pressure is higher than the minimum rail pressure for each certain engine condition for more than 300ms. P117200 is set. When DTC is set rail pressure is controlled by RPRV alone.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Signal monitoring | 1. Poor connector connection 2. Faulty RPRV 3. Faulty FPRV 4. Faulty RPS | |
Enable Conditions |
•
Engine running | ||
Threshold Value |
•
If the fuel rail pressure is higher than maximum pressure | ||
Diagnostic Time |
•
300 msec. | ||
Fail Safe | MIL |
•
Off | |
LNT Regeneration OFF |
•
No | ||
