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2012 Buick Lacrosse premium engine power reduced and service stabilitrak system
3 years 1 month ago - 3 years 1 month ago #48080
by Chad
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Replied by Chad on topic 2012 Buick Lacrosse premium engine power reduced and service stabilitrak system
P0089 and P228D refer to the High Pressure fuel rail.
The High Pressure Fuel Pump has a solenoid (a Violet/Black wire and a Yellow wire), that when not powered, allows %100 of the HP Fuel Pump output to pass through to the High Pressure fuel rail. The ECM controls this solenoid, which controls the Fuel Rail Pressure, with a Pulse Width Modulated signal.
P0089 is saying that there is a problem with the PWM signal from the ECM to the Fuel Pump solenoid. Check to verify that you have a PWM signal at the High Pressure Fuel Pump control solenoid. Loss of power, here, will cause high fuel rail pressure and set P228D
The High Pressure Fuel Pump has a solenoid (a Violet/Black wire and a Yellow wire), that when not powered, allows %100 of the HP Fuel Pump output to pass through to the High Pressure fuel rail. The ECM controls this solenoid, which controls the Fuel Rail Pressure, with a Pulse Width Modulated signal.
P0089 is saying that there is a problem with the PWM signal from the ECM to the Fuel Pump solenoid. Check to verify that you have a PWM signal at the High Pressure Fuel Pump control solenoid. Loss of power, here, will cause high fuel rail pressure and set P228D
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Last edit: 3 years 1 month ago by Chad.
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3 years 1 month ago #48081
by Chad
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Replied by Chad on topic 2012 Buick Lacrosse premium engine power reduced and service stabilitrak system
P0AC4 and P0A90 refer to the Hybrid Powertrain Control Module. I don't know much about hybrid systems. A google search brought this up:
www.autocodes.com/p0ac4.html
Hopefully, someone else can chime in with more info on these codes.
www.autocodes.com/p0ac4.html
Hopefully, someone else can chime in with more info on these codes.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Please Log in or Create an account to join the conversation.
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