GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Yukon - 2WD 🢒 Engine 🢒 Engine Controls - 6.5L 🢒 DTC P0219 Engine Overspeed

Object Number: 185026 Size: LF
Engine Controls Components
Fuel Controls
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice

Circuit Description

The PCM has the ability to put the vehicle in an ESO controlled idle if an engine overspeed condition has been detected.

Conditions for Running the DTC

The engine is operating.

Conditions for Setting the DTC

An RPM drop with 5 ESO cycles.

Action Taken When the DTC Sets
    • ESO controlled idle (the PCM will control RPM by turning the ESO ON and OFF. RPM will fluctuate from 800 to 1200 when DTC is set).
    • The PCM will not illuminate the malfunction indicator lamp (MIL).
    • The PCM records the operating conditions at the time the diagnostic fails. This information will store in the Failure Records.

Conditions for Clearing the MIL/DTC
    • A History DTC clears after forty consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures
    • The use of a scan tool.

Diagnostic Aids

This DTC will not set if an external fuel source is causing an overspeed condition. A DTC P1216 will set along with DTC P0219.

Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

  1. The injection pump is being replaced in this step.

Step

Action

Value(s)

Yes

No

1

Important: Before clearing the DTCs, use the scan tool Capture Info to save the Freeze Frame and failure records for reference. The control module's data is deleted once the Clear Info function is used.

Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?

--

Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

2

Replace the fuel injection pump. Refer to Fuel Injection Pump Replacement .

Important: The new injection pump must be timed. Refer to Fuel Injection Pump Timing Adjustment .

Is the action complete?

--

Go to Step 3

--

3
  1. Using the scan tool, clear the DTCs.
  2. Start the engine.
  3. Allow the engine to idle at normal operating temperature.
  4. Select DTC and the Specific DTC function.
  5. Enter the DTC number which was set.
  6. Operate the vehicle, with the Condition for Setting this DTC, until the scan tool indicates the diagnostic Ran.

Does the scan tool indicate the diagnostic Passed?

--

Go to Step 4

Go to Step 2

4

Does the scan tool display any additional undiagnosed DTCs?

--

Go to the Applicable DTC Table

System OK