LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2000 >> Metro Base, 2D Hatchback >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 1.0L & 1.3L >> Diagnostic Tests >> 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. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Turn ignition on, with engine off. Using scan tool, monitor MAP sensor parameter and record MAP sensor value. Start engine and record MAP sensor value. If MAP sensor values changed to greater than 4.8 psi (33 kPa), go to next step. If MAP sensor value does not change to greater than 4.8 psi (33 kPa), go to step  4.
  3. Turn ignition on, with engine off. Using scan tool, clear DTC information. Operate vehicle within freeze frame conditions. If DTC resets, go to next step. If DTC does not reset, see DIAGNOSTIC AIDS .
  4. Check for damaged, disconnected or misrouted vacuum hoses. Check for a plugged vacuum hose or valve. Check for intake manifold leaks, MAP sensor seal leaks or throttle body leaks. Check for a faulty, missing or incorrectly installed PCV valve. Check for restricted air intake or exhaust system. Repair as necessary. After repairs, go to step  11. If no problems are found, go to next step.
  5. Turn ignition on, with engine off. Disconnect MAP sensor electrical connector. Using DVOM, check voltage between ground and MAP sensor connector (harness side) input circuit. See WIRING DIAGRAMS article. If voltage reading is 4.9-5.0 volts, go to next step. If voltage reading is not 4.9-5.0 volts, go to step  7.
  6. Using DVOM, check voltage between MAP sensor connector (harness side) reference voltage circuit and ground circuit. See WIRING DIAGRAMS article. If voltage reading is 4.9-5.0 volts, go to step  8. If voltage reading is not 4.9-5.0 volts, go to step  9.
  7. Check for open, short to ground or short to voltage in MAP sensor input circuit. Ensure MAP sensor input circuit is not shorted to ground circuit. Repair as necessary. After repairs, go to step  11. If circuit is okay, go to step  10.
  8. Replace MAP sensor. After replacing sensor, go to step  11.
  9. Repair open or high resistance in MAP sensor ground circuit. After repairs, go to step  11.
  10. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  11. After repairs, using scan tool, clear DTC information. Road test vehicle within freeze frame conditions that set DTC. Check for DTCs. If no DTCs are stored, repair is complete. If any DTCs are stored, diagnose DTC(s).
scientia non olet · About LEMON Manuals