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Home >> Pontiac >> 2007 >> Vibe Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - DTC P0452 To DTC P2138 >> DTC P2112 >> Test Description

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  If there any TAC system related DTCs set, fix those DTCs first.
DTC P2112

Step Action Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View Reference:  Powertrain Control Module Connector End Views  or  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2  Are any other TAC system, TP sensor, or APP sensor DTCs also set? Go to Diagnostic Trouble Code (DTC) List - Vehicle Go to Step 3 
3
  1. Turn ON the ignition, with the engine OFF.
  2. Clear the DTCs with a scan tool.
  3. Turn OFF the ignition for 30 seconds.
  4. Start the engine.
  5. Move the accelerator pedal from the rest position to the wide open position a couple of times.
  6. Observe the DTC Information with a scan tool.
Did the DTC fail this ignition?		 Go to Step 5  Go to Step 4 
4
  1. Observe the Freeze Frame/Failure records data for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure records data.
Did the DTC fail this ignition cycle?		 Go to Step 5  Go to Diagnostic Aids
5
  1. Turn OFF the ignition.
  2. Disconnect the air cleaner duct from the throttle body.
  3. Inspect the throttle body bore and the throttle valve for foreign material or an obstruction.
  4. Remove or repair any condition as necessary.
  5. Ensure that the throttle operates freely and without excessive effort.
Did you find and correct the condition?		 Go to Step 8  Go to Step 6 
6
  1. Inspect the throttle bore and throttle valve for physical damage, binding, misaligned.
  2. Replace the throttle body assembly as necessary. Refer to Throttle Body Assembly Replacement .
Did you find and correct the condition?		 Go to Step 8  Go to Step 7 
7 Replace the throttle body assembly. Refer to Throttle Body Assembly Replacement .
Did you complete the replacement?		 Go to Step 8  -
8
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition?		 Go to Step 2  Go to Step 9 
9 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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