Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC P1106: Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High VoltageDTC P1107: Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
5-Volt Reference Voltage | P0107, P1107 | P0107, P1107 | P0108, P1106 | P0106 |
MAP Sensor Signal | P0107, P1107 | P0107, P1107 | P0108, P1106 | P0106 |
Low Reference | -- | P0107, P1107 | -- | P0106 |
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 engine control module (ECM) supplies 5 volts to the MAP sensor on the 5-volt reference circuit. The ECM provides a ground on the low reference circuit. The MAP sensor provides a signal to the ECM on the MAP sensor signal circuit which is relative to the pressure changes in the manifold. The ECM detects a low signal voltage at a low MAP, such as during an idle or a deceleration. The ECM detects 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 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 throttle position (TP) sensor is greater than 28 percent.
Conditions for Running the DTC
P1106
| • | DTCs P0122, P0123, P1121, and P1122 are not set. |
| • | The engine has been running for more than 10 seconds. |
| • | The TP sensor is less than 15 percent while the engine speed is less than 2,500 RPM or the TP sensor is less than 35 percent while the engine speed is greater than 2,500 RPM. |
| • | The DTC runs continuously when the above conditions are met. |
P1107
| • | DTCs P0122, P0123, P1121, P1122 are not set. |
| • | The TP sensor is greater than 0 percent while the engine speed is less than 1,000 RPM or the TP sensor is greater than 5 percent while the engine speed is greater than 1,000 RPM. |
| • | The ignition 1 voltage is greater than 11.5 volts. |
| • | The DTC runs continuously when the above conditions are met. |
Conditions for Setting the DTC
P1106
The ECM detects the MAP sensor is more than 103 kPa for 2 seconds intermittently.
P1107
The ECM detects the MAP sensor is less than 12 kPa for 2 seconds intermittently.
Action Taken When the DTC Sets
DTC P1106 and P1107 are Type C DTCs.
Conditions for Clearing the MIL/DTC
DTC P1106 and P1107 are Type C DTCs.
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Engine running, observe the DTC information with a scan tool. DTCs P0107 or P0108 should not set.
- Observe the DTC information with a scan tool. DTCs P1106 or P1107 should not set.
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
| ⇒ | If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. |
Circuit/System Testing
Engine running, observe the scan tool manifold absolute pressure (MAP) sensor parameter while moving the related wiring harness and harness connectors. The reading should not change abruptly.
| ⇒ | If the reading changes abruptly, repair the wiring harness and harness connectors. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ECM replacement, setup, and programming |
