NGC

P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW





For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
With engine speed within 64 RPM of target idle, MAP sensor voltage between.04 volts and 4.96 volts, no vehicle speed, and the throttle closed.

- Set Condition:
Each time the PCM detects that the MAP sensor value is greater than a calibrated value for BARO, a counter is incremented. If the counter reaches a calibrated limit, the test fails. One trip fault. Three good trips to turn off the MIL.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Initial Inspection and Diagnostic Overview

Diagnostic Test

1. CHECKING THE MAP SENSOR OPERATION

NOTE: Diagnose and repair any MAP sensor circuit DTCs before continuing with this test.

Perform the diagnostic procedure for *CHECKING THE MAP SENSOR OPERATION. Checking the MAP Sensor Operation
Were any problems found?

Yes

- Repair as necessary.
- Perform the PCM Verification Test. Powertrain Verification Test

No

- Refer to the CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. Checking For An Intermittent DTC