Notes On Intermittents

Code "EO34" is usually set by a vacuum supply problem to MAP sensor. Check for proper vacuum routing for MAP hose connected to proper throttle body port, or MAP hose chafed, pinched or cut. Apply vacuum to MAP hose at throttle body, and look for vacuum leaks in MAP hose or MAP sensor.

Manipulate affected wiring and connections while observing ECM parameter code "ED02" jump or skip high with vacuum applied. The condition has been induced and cause of intermittent can be repaired.

Fig 1: Hard Trouble Code E034 - Map Signal Too High

Fig 2: Hard Trouble Code E034 - Map Signal Too High (1 of 2)

Fig 3: Hard Trouble Code E034 - Map Signal Too High (2 of 2)

Fig 4: Schematic for Hard Trouble Code E034