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Home >> Chevrolet >> 1997 >> Cavalier RS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.2L >> Diagnostic Trouble Codes >> DTC P0106 - Map Sensor System Performance >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK. See the BASIC TESTING - 2.2L article. After performing OBD system check, go to next step.
  2. Turn ignition on, with engine off. Using scan tool, compare BARO reading with a known good vehicle. If BARO reading is normal for the altitude, go to next step. If not, go to step 8).
  3. Start engine while watching MAP sensor value. If MAP sensor value changes, go to next step. If not, go to step 5).
  4. With engine still running, snap throttle while watching MAP sensor display on scan tool. If MAP sensor value change rapidly with throttle position changes, go to step 9). If not, go to step 6).
  5. Disconnect MAP sensor vacuum hose. Install and hand-held vacuum pump to MAP sensor. Turn ignition on, with engine off. Apply 15 in. Hg to MAP sensor. Monitor MAP sensor value on scan tool. If MAP sensor value changes, go to step 7). If not, go to step 8).
  6. Remove MAP sensor vacuum hose from manifold port. Inspect port and hose for restriction. Repair as necessary. After repairs, go to step 9). If no problems were found, go to step 8).
  7. Repair restriction in MAP sensor vacuum hose or port. After repairs, go to step 9).
  8. Replace MAP sensor. After replacing sensor, go to step 9).
  9. 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).
  10. If any other DTCs are set, diagnose DTCs as necessary. If no other DTCs are set, no problem is indicated at this time.
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