Description
OBD-II Trouble Code Description for P2585 Buick
Fuel Additive Control Module Warning Lamp Request
What does this mean?
OBD2 Code P2585 Buick definition:
The PCM monitors the PCL lamp condition using the PCL lamp operation signal that from the fuel additive control module to instrument cluster. When the fuel additive control module detects that the fuel additive amount is empty. The fuel additive control module sends the signal to instrument cluster and PCM. If the PCM received the signal, the PCM determines that the fuel additive control module requests the PCL lamp to ON.
Symptoms
Possible sumptoms of OBD code P2585 Buick
Lamp On, Maybe Limp Mode
Causes
Possible causes of OBD code P2585 Buick
No fuel additive in fuel additive tank
Fuel additive system malfunction
Fuel additive level sensor malfunction
Fuel additive control module malfunction
Possible Solutions
Diagnostic procedure
|
STEP |
INSPECTI BuickON |
ACTION Buick |
|
|---|---|---|---|
|
1
|
VERIFY FREEZE FRAME DATA HAS BEEN RECORDE BuickD
???Has the FREEZE FRAME DATA been recorded?
|
Yes
|
Go to the next step.
|
|
No
|
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
|
||
|
2
|
VERIFY REPAIR INFORMATION AVAILABILIT BuickY
???Verify related service repair information availability.
???Is any related repair information available?
|
Yes
|
Perform repair or diagnosis according to the available repair information.
If the vehicle is not repaired, go to the next step.
|
|
No
|
Go to the next step.
|
||
|
3
|
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
???Is P2585 Buick on FREEZE FRAME DATA?
|
Yes
|
Go to the applicable DTC inspection.
|
|
No
|
Go to the next step.
|
||
|
4
|
CHECK Buick PCL LAMP STATE
???Start the engine.
???Check the PCL lamp state.
???Does the PCL lamp illuminate?
|
Yes
|
Refill the fuel additive, then go to Step 8.
|
|
No
|
Go to the next step.
|
||
|
5
|
INSPECT FUEL FILLER CAP SWITCH
???Inspect the fuel filler cap switch.
???Is the fuel filler cap switch normal?
|
Yes
|
Go to the next step.
|
|
No
|
Replace the fuel filler cap switch, then go to Step 8.
|
||
|
6
|
INSPECT FUEL ADDITIVE LEVEL SENSOR
???Inspect the fuel additive level sensor.
???Is the fuel additive level sensor normal?
|
Yes
|
Go to the next step.
|
|
No
|
Replace the fuel additive level sensor, then go to Step 8.
|
||
|
7
|
IDENTIFY MALFUNCTI BuickON AT FUEL ADDITIVE CONTR BuickOL MODULE OR NOT
???Make sure to reconnect all disconnected connectors.
???Clear the DTC from the PCM memory using the M-MDS.
???Start the engine and warm-up to normal operating temperature.
???Run the vehicle under the FREEZE FRAME DATA stored condition.
???Retrieve the DTC using the M-MDS.
???Is the PENDI BuickNG CODE same DTC present?
|
Yes
|
Inspect and repair or replace the fuel additive pump, then go to the next step.
|
|
No
|
Replace fuel additive control module, then go to the next step.
|
||
|
8
|
VERIFY THAT DTC P2585 Buick TROUBLES BuickHOOTING IS COMPL BuickETED
???Make sure to reconnect all disconnected connectors.
???Clear the DTC from the PCM memory using the M-MDS.
???Start the engine and warm-up to normal operating temperature.
???Run the vehicle under the FREEZE FRAME DATA stored condition.
???Retrieve the DTC using the M-MDS.
???Is the PENDI BuickNG CODE same DTC present?
|
Yes
|
Replace PCM, then go to the next step.
|
|
No
|
Go to the next step.
|
||
|
9
|
VERIFY AFTER REPAIR PROCE BuickDURE
???Perform “After Repair Procedure”.
???Is there any DTC present?
|
Yes
|
Go to the applicable DTC inspection.
|
|
No
|
Troubleshooting completed.
|
||