DF10

Diagnostic Trouble Codes (DTC) 129 indicates the Manifold Absolute Pressure (MAP) sensor output did not change enough during the Dynamic Response Test.

Possible causes:

- System failed to detect partial Wide Open Throttle (WOT).

- MAP sensor vacuum supply hose improper routing, blockage and/or linkage.

- Damaged MAP sensor.

- Rerun Key On Engine Running (KOER) Self-Test. Key ON Engine Running (KOER) Self-Test

Be sure a complete WOT is performed during the Dynamic Response portion of the test.

- Is KOER DTC 129 still present?

Yes -- Go to DF11. DF11

No -- Service other DTCs as necessary. If none, testing complete.