P1107

Circuit Description
The manifold absolute pressure (MAP) sensor responds to changes in intake manifold pressure. The powertrain control module (PCM) supplies a 5 volt reference and a ground for the MAP sensor. The MAP sensor provides a signal to the PCM relative to pressure changes in the manifold. The MAP sensor signal voltage to the PCM varies from below 2 volts at idle to above 4 volts with the key on and the engine not running or at wide-open Throttle. The PCM monitors the MAP signal for voltage outside the normal range of the MAP sensor. If the PCM detects a MAP signal voltage that is intermittently low, DTC P1107 is set.

Conditions for Running the DTC
1. No Throttle position (TP) sensor DTCs are present.
2. The ignition is on.
3. The Throttle angle is steady above 6% if the engine speed is greater than 1000 RPM.

Conditions for Setting the DTC
The MAP sensor intermittently indicates a manifold absolute pressure below 0.1 volt.

Action Taken When the DTC Sets
The PCM stores the conditions which were present when the DTC set as Fail Records data only.

Conditions for Clearing the MIL/DTC
^ A history DTC clears after 40 consecutive warm-up cycles have occurred without a malfunction.
^ DTC may be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.

Diagnostic Aids
Inspect for the following conditions:
1. A faulty connection at the PCM or the MAP sensor. Inspect the PCM harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and faulty terminal to wire connections.
2. Inspect the wiring harness for damage. If the harness appears to be OK, observe the MAP display on a scan tool while moving the connectors and wiring harnesses related to the sensor. A change in the display indicates the location of the malfunction.
Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.