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DTC P1297: No Change In Map Sensor From Start To Run: Description

NOTE: Vehicles equipped with a 2.7L engine are equipped with a Manifold Absolute Pressure (MAP) sensor. Vehicles equipped with a 3.2L and 3.5L engine are equipped with an Intake Air Temperature/Manifold Absolute Pressure (IAT/MAP) sensor. For this test, IAT/MAP will be identified as MAP sensor.

MAP sensor signal is monitored when engine speed is within 64 RPM of target idle speed with throttle plate closed. DTC will set in Powertrain Control Module (PCM) memory when PCM senses too small of a difference between barometric pressure (with ignition on) and manifold vacuum (with engine running). Possible causes are: 5-volt supply circuit open or shorted, defective MAP sensor, signal circuit open or shorted, MAP sensor vacuum port restricted or defective PCM.

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