Conditions for Setting the DTC

DTC P0090

• The ECM detects the commanded state of the driver and the actual state of the control circuit do not match for greater than 0.22 s.
• The ECM detects an open or high resistance on one of the fuel pressure regulator 1 circuits for greater than 0.22 s.

DTC P0091

• The ECM detects low voltage on the control circuit of fuel pressure regulator 1 for greater than 0.28 s.

DTC P0092

• The ECM detects high voltage on the control circuit of fuel pressure regulator 1 for greater than 0.22 s.

DTC P00C9

• The ECM detects low voltage on the supply voltage circuit of fuel pressure regulator 1 for greater than 0.3 s.

DTC P00CA

• The ECM detects high voltage on the supply voltage circuit of fuel pressure regulator 1 for greater than 0.1 s.