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Home >> Cadillac >> 2004 >> CTS Base, 3.6 7 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls - 2.6L & 3.2L - Diagnosis (DTC P0030 - P0174)) >> Diagnostic Trouble Codes >> DTC P0101 >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

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

  1. 4:  This step will determine if the MAF sensor voltage is less than the proper range at idle.
  2. 5:  This step will determine if the MAF sensor voltage is more than the proper range at idle.
  3. 6:  This step will determine if the throttle position (TP) sensors are operating properly.
  4. 7:  This step will determine if any mechanical faults have caused this DTC to set.
DTC P0101

Step Action Values Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View Reference:  Engine Control Module (ECM) Connector End Views  or  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check-Engine Controls? - Go to Step 2  Go to Diagnostic System Check - Engine Controls
2
IMPORTANT: If you were sent here from P0171, proceed to Step 4.
  1. Start the engine.
  2. Monitor the diagnostic trouble code (DTC) information with the scan tool.
Does the scan tool display any other DTCs set?		 - Go to Diagnostic Trouble Code (DTC) List Go to Step 3 
3
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 60 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text, or as close to the Freeze Frame/Failure Records that you observed.
Did the DTC fail this ignition?		 - Go to Step 4  Go to Diagnostic Aids
4 
  1. Allow the engine to reach operating temperature.
  2. Idle the engine.
  3. Observe the mass air flow (MAF) sensor voltage with a scan tool.
Is the MAF sensor voltage less than the specified range?		 1-1.6 V Go to DTC P0102  Go to Step 5 
5  Observe the MAF sensor voltage with a scan tool.
Is the MAF sensor voltage more than the specified range?		 1-1.6 V Go to DTC P0103  Go to Step 6 
6 
  1. Turn OFF the ignition for 60 seconds.
  2. Turn ON the ignition, with the engine OFF.
  3. Observe the TP sensor angle with a scan tool.
  4. Depress the accelerator pedal completely.
Is the TP sensor 1 angle within the specified range?		 98-100% Go to Step 7  Go to DTC P0121 
7  Inspect for the following conditions:
  • A restricted air intake duct
  • A collapsed air intake duct
  • A misaligned air intake duct
  • A dirty air filter element
  • A deteriorating air filter element
  • Any objects blocking the air inlet screen of the MAF sensor
  • Any debris or contamination on the air diffuser of the MAF sensor
  • Any debris on the sensing element of the MAF sensor
  • Any vacuum leak downstream of the MAF sensor
  • A MAF sensor that is installed backwards-Refer to Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Replacement .
  • Any type of restriction in the exhaust system-Refer to Restricted Exhaust in Engine Exhaust.

Did you find and correct the condition?		 - Go to Step 10  Go to Step 8 
8 Test for an intermittent and for a poor connection at the MAF sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 9 
9 Replace the MAF/IAT sensor. Refer to Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Replacement .
Did you complete the replacement?		 - Go to Step 10  -
10
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 60 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Did the DTC fail this ignition?		 - Go to Step 2  Go to Step 11 
11 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List System OK
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