Engine stuttering. P0090 and P2177

[jasonbarrish70]

Gday all. I've got an 09 C30 that is occasionally sputtering after idle and sometimes dies outright. I assume it is a fuel supply issue but I haven't been able to find an answer. I replaced the fuel pressure sensor from a prior code but afterwards I got this issue and the new codes. I searched for a fuel pump relay but can only find a reference to a fuse #74. The diagrams of the fuse block show no fuel pump relay. I haven't been able to find a video or article about fuel pump replacement or anything related to the C30. The issue hasn't occurred at speed at any time. It is only after idle. I can stop the car, turn it off, and the issue sometimes goes away. It is very frustrating.

[RickHaleParker]

Check list.

• 1. Fuel filter.
  2. Fuel Pump Control Module wiring and connectors.
  3. Fuel Pump Fuel Pump wiring and connectors .
  4. Fuel pressure sensor wiring and connectors.
  5. Fuel pressure sensor.
  6. Fuel Pump Control Module.
  7. Fuel Pump.

ECM-290B ( P0090 ) Fuel pressure.

Diagnostic trouble code (DTC) information ECM-290B

Condition
The engine control module (ECM) controls the fuel pressure via the fuel pump (FP) control module using a pulse width modulation (PWM) signal. The fuel pump (FP) control module then controls the fuel pump (FP) depending on the pressure requested by the engine control module (ECM). The diagnostic trouble code (DTC) is stored If the actual pressure (measured pressure from the fuel pressure sensor) pulses too much.
The diagnostic trouble code (DTC) can be diagnosed when the engine is idling.
For information about fuel pressure regulation, see VIDA Design and Function.

Substitute value
None.

Possible source

• Air in the fuel lines
  Blocked fuel lines
  Damaged fuel pressure sensor
  Damaged fuel pump
  Damaged fuel pump (FP) control module.

Fault symptoms
Driving/Poor performance/lacks power/At take off
Driving/Poor performance/lacks power
Driving/Hesitates/surges/Unsure when/at all times
Driving/Hesitates/surges/During acceleration
Driving/Hesitates/surges/During deceleration
Driving/Engine stalls/Unsure when/at all times
Idling/Engine stalls/Unsure when/at all times
Starting/Engine stalls
Starting/Engine does not start/Engine turns
Starting/Engine hard to start/cranks slowly/Unsure when/at all times
Starting/Engine does not start/Unsure when/at all times
Warning lights and chimes/Malfunction Indicator Light ("Check engine" light) indication/no indication

[jasonbarrish70]

Thanks Rick. I'm checking the PEM next. Any idea where it is in the C30?

[RickHaleParker]

Thanks Rick. I'm checking the PEM next. Any idea where it is in the C30?

Under second row seating. Remove the bottom cushion.

[jasonbarrish70]

Ended up swapping the PEM with another unit from my other 09 C30 and drove around. Got the P2177 code again but not the P0090. So, now what? I read that it could be vacuum lines, or the fuel filter, MAF, or the pump, etc. Good Grief.

[RickHaleParker]

Got the P2177 code again but not the P0090.

Clear all codes. P2177 is almost always cause by another code.
You might want to try another scanner. Some do not show pending codes. Some do not read all the codes. You can get a free scan at Autozone.

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ECM-532D (P2177) High emissions. Faulty signal

Diagnostic trouble code (DTC) information ECM-532D

Condition
Diagnostic functions in the engine control module (ECM) have activated substitute values that result in fuel shut-off. The diagnostic trouble code (DTC) is stored in the engine control module (ECM) if it detects that fuel shut-off has been activated by the diagnostic function to such an extent that emissions may be negatively affected.

Substitute value
None.

Possible source
Faults that are detected by another diagnostic function and whose substitute values result in fuel shut-off.

Fault symptoms
Malfunction indicator lamp (MIL) lit
Jerky operation.