DF7

Diagnostic Trouble Code (DTC) 126 (Key On Engine Running) indicates the Manifold Absolute Pressure (MAP) / Barometric Pressure (BARO) signal is out of range for Engine Running Self-Test Possible causes:

- Damaged MAP/BARO sensor.

- Damaged vacuum hoses.

- Excess EGR flow.

- Are DTCs 326, 327, 328, 332, 334, 336 or 337 present?

Yes -- Go to EEC-IV Diagnostic Trouble Code Charts, for appropriate Pinpoint Test. Manufacturer Code Charts

No -- Go to DF8. DF8