GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 LaCrosse 🢒 DTC 🢒 DTC P0107, P0108, P1106, or P1107

DTC Descriptors

DTC P0107: Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage

DTC P0108: Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

DTC P1106: Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage

DTC P1107: Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit

Short to Ground

High Resistance

Open

Short to Voltage

Signal Performance

5-Volt Reference

P0107, P0405, P0452, P0462, P0532, P0641, P1107

P0107

P0107, P1107

P0108, P0453, P0533, P0641

P0107

MAP Sensor Signal

P0107

P0107, P1107

P0107

P0108, P1106

P0107

Low Reference

--

P0108

P0108, P1106

--

P0108

Typical Scan Tool Data

MAP Sensor

Circuit

Normal Range

Short to Ground

Open

Short to Voltage

5-Volt Reference

--

10 kPa

10 kPa

104 kPa

MAP Sensor Signal

12-103 kPa

10 kPa

10 kPa

104 kPa

Low Reference

--

--

191 kPa

--

Circuit/System Description

The manifold absolute pressure (MAP) sensor responds to pressure changes in the intake manifold. The pressure changes occur based on the engine load. The MAP sensor has the following circuits:

    • 5-volt reference circuit
    • Low reference circuit
    • MAP sensor signal circuit

The control module supplies 5 volts to the MAP sensor on the 5-volt reference circuit. The control module also provides a ground on the low reference circuit. The MAP sensor provides a signal to the control module on the MAP sensor signal circuit which is relative to the pressure changes in the manifold. The control module should detect a low signal voltage at a low MAP, such as during an idle or a deceleration. The control module should detect a high signal voltage at a high MAP, such as the ignition is ON, with the engine OFF, or at a wide open throttle (WOT). The MAP sensor is also used in order to determine the barometric pressure (BARO). This occurs when the ignition switch is turned ON, with the engine OFF. The BARO reading may also be updated whenever the engine is operated at WOT. The control module monitors the MAP sensor signal for voltage outside of the normal range.

Conditions for Running the DTC

P0107 or P1107

    • DTCs P0068, P0120, P0220, P1516, P2101, P2108, P2120, P2125, P2135, or P2138 are not set
    • The ignition is ON.
    • The throttle angle is more than 0 percent, if the engine speed is less than 1,000 RPM.
        OR
    • The throttle angle is more than 10 percent, if the engine speed is more than 1,000 RPM.

P0108 or P1106

    • DTC P0068, P0120, P0220, P1516, P2101, P2108, P2120, P2125, P2135, P2138 are not set.
    • The engine has been running for a length of time that is determined by the startup coolant temperature. The length of time ranges from 5.5 minutes at less than -30°C (-22°F) to 10 seconds at more than +30°C (+86°F).
    • The throttle angle is less than 2 percent when the engine speed is less than 3,000 RPM.
        OR
    • The throttle angle is more than 30 percent when the engine speed is more than 3,000 RPM.

Conditions for Setting the DTC

P0107

    • The control module detects that the MAP sensor voltage is less than 0.1 volt for more than 3 seconds.
    • This diagnostic runs continuously.

P0108

    • The control module detects that the MAP sensor voltage is more than 4.3 volts for more than 3 seconds.
    • This diagnostic runs continuously.

P1106

    • The control module detects that the MAP sensor voltage is intermittently more than 4.3 volts.
    • This diagnostic runs continuously.

P1107

    • The control module detects that the MAP sensor voltage is intermittently less than 0.1 volt.
    • This diagnostic runs continuously.

Action Taken When the DTC Sets

P0107 and P0108

    • The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
    • The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

P1106 and P1107

    • The control module stores the DTC information into memory when the diagnostic runs and fails.
    • The malfunction indicator lamp (MIL) will not illuminate.
    • The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
    • The driver information center, if equipped, may display a message.

Conditions for Clearing the DTC

P0107 or P0108

    • The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
    • A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
    • A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
    • Clear the MIL and the DTC with a scan tool.

P1106 or P1107

    • A current DTC Last Test Failed clears when the diagnostic runs and passes.
    • A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
    • Clear the DTC with a scan tool.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

    •  Powertrain Control Module Connector End Views
    •  Engine Controls Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Scan Tool Data List

Special Tool Reference

J 23738-A Mityvac

Circuit/System Testing
  1. Start the engine.
  2. Monitor the DTC information with the scan tool.
  3. If DTC P0641 or P0651 is also set, then correct DTC P0641 or P0651 first.
  4. Inspect for the following conditions:
    5. • Any disconnected, damaged, or incorrectly routed hoses
    • The MAP sensor disconnected from the vacuum source
    • Any restrictions in the vacuum source
    • Any intake manifold vacuum leaks
    • Verify a properly functioning oxygen sensor--refer to Scan Tool Data List .
  5. With the ignition ON, and the engine OFF
  6. Disconnect the MAP sensor.
  7. Measure for 4.8-5.2 volts from the 5-volt reference circuit of the MAP sensor to a good ground, with a DMM.
    8. ⇒If more than 5.2 volts, then test the 5-volt circuit for a short to voltage. If the circuit tests normal, replace the control module.
    ⇒If less than 4.8 volts, then test the 5-volt reference circuit for high resistance, an open, a short to ground or an intermittent and poor connection or at the control module. If the circuit tests normal, replace the control module.
  8. Use a scan tool and observe the MAP sensor for less than 12 kPa.
    9. ⇒If the MAP sensor is more than 12 kPa, then test the MAP sensor signal circuit for a short to voltage. If the circuit tests normal, replace the control module.
  9. Use a 3A fused jumper wire and connect it between the MAP sensor 5-volt reference circuit and the MAP sensor signal circuit.
  10. Observe the MAP sensor for more than 103 kPa.
    11. ⇒If the MAP sensor is less than 103 kPa, then test the MAP sensor signal circuit for a short to ground, an open or high resistance. If the circuit tests normal, replace the control module.
  11. Turn OFF the ignition and allow the control module to power down.
  12. With a DMM, measure for less than 5 ohms of resistance between the low reference circuit of the MAP sensor and battery negative post.
    13. ⇒If the resistance is more than 5 ohms, then test the low reference circuit for a high resistance. If the circuit tests normal, replace the control module.
  13. Remove the MAP sensor from the engine vacuum source. Leave the MAP sensor connected to the engine harness.
  14. Connect the J 23738-A to the MAP sensor.
  15. Turn ON the ignition, with the engine OFF.
  16. Observe the MAP sensor pressure with the scan tool.
  17. Apply vacuum with the J 23738-A to the MAP sensor in 1 inch Hg increments, until 15 inches Hg is reached. Each 1 inch Hg should decrease MAP sensor pressure by 3-4 kPa. Monitor the MAP sensor pressure to see if the decrease in pressure is consistent.
    18. ⇒If decrease in pressure is not consistent, then test for intermittent and poor connections at the MAP sensor. If connections test OK, replace the MAP sensor.
  18. Apply vacuum with the J 23738-A until 20 inches Hg is reached. Observe the MAP sensor pressure less than 34 kPa.
    19. ⇒If more than 34 kPa, test for an intermittent and for a poor connection at the MAP sensor. If connections test OK, replace the MAP sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Manifold Absolute Pressure Sensor Replacement
    •  Control Module References