DTC P1214 Injection Pump Timing Offset. GMC Truck Savana 1998

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1998 🢒 Savana 🢒 DTC 🢒 DTC P1214 Injection Pump Timing Offset

Engine Controls Components
Cell 22: Sensor Controls
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice

Circuit Description

The PCM has the ability to determine the amount of offset needed to bring the engine to top dead center. This is used by the PCM to determine proper injection time.

Conditions for Setting the DTC

One or more of the following conditions will set the DTC.

•	TDC offset greater than 2.46 degrees

•	TDC Offset less than -2.46 degrees.

Action Taken When the DTC Sets

•	The PCM illuminates the Malfunction Indicator Lamp (MIL) on the second consecutive drive trip the diagnostic runs and fails.

•

The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the Failure Records store this information. If the diagnostic reports a failure on the second consecutive drive trip, the Freeze Frame records the operating conditions at the time of failure and updates the Failure Records.

Conditions for Clearing the MIL/DTC

•	The PCM will turn the MIL off after three consecutive trips without a fault condition.

•	A History DTC will clear when forty consecutive warm-up cycles that the diagnostic does not fail (coolant temperature has risen 22°C (40°F) from start up coolant temperature and engine coolant temperature exceeds 71°C (160°F) that same ignition cycle.

•	Use of a Scan Tool

Diagnostic Aids

The PCM will only run the diagnostic test when a TDC offset adjustment procedure has been activated. It is highly unlikely that the vehicle will be brought in with this DTC set. Refer toTDC Offset Adjustment .

Step

Action

Value(s)

Yes

Important: Before clearing any DTCs, use the Scan Tool Capture Info to save freeze frame and failure records for reference, as the Scan Tool loses data when using the Clear Info function.

Was the Powertrain On Board Diagnostic (OBD) System Check performed?

Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

Are there any other DTCs set?

Go to the Applicable DTC Table

Go to Step 3

Clear all of the codes and reset the injection timing until the TDC Offset is between the specified values. Refer to TDC Offset Adjustment .

Is the timing within the specified value?

-0.25 to -0.75

Go to Step 6

Go to Step 4

Check the crankshaft position sensor for the following.

•	Proper installation

•	A loose or broken sensor mounting tab

Was a repair performed?

Go to Step 6

Go to Step 5

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

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

Is the action complete?

Go to Step 6

Using the Scan Tool, clear the DTCs.
Start engine and idle at normal operating temperature.
Select DTC, Specific, then enter the DTC number which was set.
Operate the vehicle, within the Conditions for Setting this DTC, until the Scan Tool indicates the diagnostic Ran.

Does the Scan Tool indicate the diagnostic Passed?

Go to Step 7

Go to Step 2

Does the Scan Tool display any additional undiagnosed DTCs?

Go to the Applicable DTC Table

System OK