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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Engine Controls - Self Diagnostics - 4.7L) >> Diagnostic Tests >> DTC P0129: Barometric Pressure Out-Of-Range >> Testing

DTC P0129: Barometric Pressure Out-Of-Range: Testing

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition on, engine not running. With the DRBIII® scan tool, read DTCs and record the related freeze frame data. Is the Good Trip displayed and equal to zero? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn the ignition off. Disconnect the MAP sensor harness connector. Ignition on, engine not running. Measure the voltage of the (K6) 5-volt supply circuit in the MAP sensor harness connector. Is the voltage 4.5-5.2 volts? If yes, go to next step. If no, go to step  6.
  3. With the DRBIII® scan tool, monitor the MAP sensor voltage with the MAP sensor harness connector disconnected. Is the voltage above 2.2 volts? If yes, replace the MAP sensor. If no, go to next step.
    4. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  4. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance of the (K1) MAP signal circuit from the MAP sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the (K1) MAP signal circuit for an open.
  5. Measure the resistance between ground and the (K1) MAP signal circuit at the MAP sensor harness connector. Is the resistance below 100 ohms? If yes, repair the (K1) MAP signal circuit for a short to ground. If no, go to next step.
  6. Turn the ignition off. Disconnect the PCM harness connectors. Ignition on, engine not running. Measure the voltage of the (K6) 5-volt supply circuit in the MAP sensor harness connector. Is the voltage above 5.2 volts? If yes, repair the (K6) 5-volt supply circuit for a short to battery voltage. If no, go to next step.
    7. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  7. Turn the ignition off. Measure the resistance of the (K6) 5-volt supply circuit in the MAP sensor harness connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the (K6) 5-volt supply circuit for an short to voltage.
  8. Measure the resistance of the (K6) 5-volt supply circuit in the MAP sensor harness connector to ground. Is the resistance below 100 ohms? If yes, repair the 5-volt supply circuit for a short to ground. If no, go to next step.
    9. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  9. Using the wiring diagram as a guide, inspect the wire harness and connectors. Pay particular attention to all power and ground circuits. Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals. Visually inspect both the component and the PCM connectors. Look for damage, partially broken wires and backed out or corroded terminals. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
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