LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 1996 >> Century Custom >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes - 2.2L >> Diagnostic Trouble Codes >> DTC P0106 - Map Sensor System Performance >> Diagnostic Procedures
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) System Check. After performing OBD system check, go to next step.
  2. Start engine and allow it to idle. Using scan tool, observe MAP sensor voltage. MAP sensor voltage should be 1.0-1.5 volt. If MAP sensor voltage varies by more than .33 volt, go to next step. If MAP sensor voltage does not vary by more than .33 volt, go to step 4).
  3. Turn ignition on, with engine off. Disconnect MAP sensor connector. Using scan tool, observe MAP sensor voltage. If voltage is one volt or less, go to step 5). If voltage is more than one volt, go to step 6).
  4. Observing scan tool display, wiggle, pull and twist MAP sensor connector. MAP sensor voltage should be 1.0-1.5 volt. If MAP sensor voltage varies by more than .33 volt, go to step 3). If MAP sensor voltage does not vary by more than .33 volt, go to step 7).
  5. Disconnect and inspect PCM and MAP sensor connectors. If connectors are okay, go to step 9). If connector(s) are not okay, go to step 8).
  6. Disconnect and inspect PCM connector. If connector is okay, go to step 12). If connector is not okay, go to step 8).
  7. Ensure ignition is on, with engine off. Using scan tool, review FREEZE FRAME data and note parameters. Observing scan tool display, drive vehicle at a steady speed. If MAP sensor voltage varies by more than .33 volt, go to step 3). If MAP sensor voltage does not vary by more than .33 volt, go to DIAGNOSTIC AIDS.
  8. Repair connector pins and/or wiring as necessary. After repair is completed, go to step 13).
  9. Check for restricted or leaking MAP sensor vacuum hose. If vacuum hose is okay, go to next step. If vacuum hose is not okay, go to step 11).
  10. Replace MAP sensor. After repair is completed, go to step 13).
  11. Replace MAP sensor vacuum hose as necessary. After repair is completed, go to step 13).
  12. Replace PCM. Program replacement PCM using required equipment. After repair is completed, go to next step.
  13. Using scan tool, select CLEAR INFO or CLEAR DTCS function to clear DTCs. Start engine and allow it to idle. Ensure engine is at normal operating temperature. Drive vehicle at a steady speed. Select SPECIFIC DTC function then enter DTC P0106. If scan tool indicates TEST RAN AND PASSED, go to next step. If scan tool does not indicate TEST RAN AND PASSED, repeat step 2).
  14. If any other DTCs are set, diagnose DTCs as necessary. If no other DTCs are set, no problem is indicated at this time.
scientia non olet · About LEMON Manuals