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Home >> Oldsmobile >> 1996 >> Eighty-Eight LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Systems Tests W/Codes >> 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. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Using scan tool, read and record FAIL RECORDS data. Operate vehicle within conditions noted in FAIL RECORDS data. Using scan tool, read SPECIFIC DTC. If scan tool displays DTC P0106 FAILED THIS IGN, go to step 4). If scan tool does not display DTC P0106 FAILED THIS IGN, go to next step.
  3. Check for MAP sensor seal missing or damaged, or vacuum hoses disconnected, damaged or incorrectly routed. Check for vacuum leaks at intake manifold, throttle body, or at EGR valve flange or pipes. Check for faulty, missing or incorrectly installed PCV valve. If a problem is found, repair as necessary and go to step 15). If no problem is found, go to DIAGNOSTIC AIDS.
  4. Disconnect MAP sensor harness connector. Using scan tool, read MAP SENSOR VALUE. If value is about zero volts, go to next step. If value is not as specified, go to step 13).
  5. Connect a test light between battery voltage and MAP sensor harness connector signal circuit. Using scan tool, read MAP SENSOR VALUE. If value is about 4.95 volts, go to next step. If value is not as specified, go to step 9).
  6. Connect a jumper wire between MAP sensor harness connector 5-volt reference and signal circuits. Using scan tool, read MAP SENSOR VALUE. If value is about 4.95 volts, go to next step. If value is not as specified, go to step 8).
  7. Turn ignition off. Disconnect PCM connectors. Check sensor ground circuit for high resistance or an open between PCM and MAP sensor. Check for faulty connection at PCM. If a problem is found, repair as necessary and go to step 15). If no problem is found, go to step 11).
  8. Check 5-volt reference circuit for high resistance or an open between PCM and MAP sensor. Check for faulty connection at PCM. If a problem is found, repair as necessary and go to step 15). If no problem is found, go to step 10).
  9. Turn ignition off. Disconnect PCM connectors. Check MAP sensor signal circuit for high resistance, an open, a short to ground, or a short to sensor ground circuit. If a problem is found, repair as necessary and go to step 15). If no problem is found, go to next step.
  10. Check MAP sensor signal circuit for faulty connection at PCM. If a problem is found, repair as necessary and go to step 15). If connection is okay, go to step 14).
  11. Check for faulty connection at MAP sensor. If a problem is found, repair as necessary and go to step 15). If connection is okay, go to next step.
  12. Replace MAP sensor and go to step 15).
  13. Turn ignition off. Disconnect PCM connectors. Turn ignition on. Check MAP sensor signal circuit for short to voltage or short to 5-volt reference circuit. If problem is found, repair as necessary and go to step 15). If no problem is found, go to next step.
  14. Replace PCM. Program replacement PCM using required equipment. Go to next step.
  15. Turn ignition on, engine off. Using scan tool, read and record FAIL RECORDS DATA, and clear DTCs. Operate vehicle within conditions noted in FAIL RECORDS data. Using scan tool, select SPECIFIC DTC INFO for DTC P0106. If scan tool displays DTC P0106 FAILED THIS IGN, return to step 2). If scan tool does not display DTC P0106 FAILED THIS IGN, repair is complete.
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