DTC Advanced Diagnostics: P053F
DTC P053F:Fuel Rail Pressure Performance

General Description

The high pressure fuel system consists of a fuel rail, a fuel rail pressure sensor, a high pressure fuel pump with a built-in fuel control solenoid. In dependence of torque demand and engine speed, high pressure has to be adjusted. Therefore the fuel pressure in the rail is measured and controlled with help of the fuel control solenoid. If the difference between the desired and measured fuel rail pressure is too large, combustion and emissions can be influenced. The powertrain control module (PCM) monitors the high pressure fuel control system. The diagnosis checks the plausibility of the high pressure controller output if the activation of the fuel control solenoid extremely deviates from the pre-control. If the pressure deviation at controller output is a specified value during catalyst heating is active, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
3 seconds or more
DTC Type
Two drive cycles, MIL on

Enable Conditions
Condition
Minimum
Maximum
Elapsed time after starting the engine
2 seconds
–
Relative fuel mass quantity
5.02 %
320.02 %
Other
Catalyst heating is active
Catalyst heating request by cold engine
High pressure regulation flag is switched on

Malfunction Threshold
Either of the conditions occurs for at least 3 seconds:
The positive pressure deviation at controller output is greater than 1,500 kPa (15.30 kgf/cm2, 217.6 psi) during catalyst heating.
The negative pressure deviation at controller output is less than -1,500 kPa (-15.30 kgf/cm2, -217.6 psi) during catalyst heating.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes
High pressure fuel pump failure (pressure relief valve defection)
Fuel pump low flow
High pressure fuel pipe leakage
Fuel injector contamination
Fuel rail pressure sensor drifting

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.