Note On Intermittents

Code EO34 is usually set by a vacuum supply problem to MAP sensor. Check proper vacuum routing 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 vacuum leaks in MAP hose or MAP sensor.

Manipulate affected wiring and connections while observing PCM parameter ED02. If PCM parameter jumps or skips high with vacuum applied, the condition has been induced and cause of intermittent can be repaired. If wiring and connectors are okay, substitute a known good sensor and retest.

Fig 1: PCM Code EO34, Schematic, MAP Signal Too High

Fig 2: Flow Chart, PCM Code EO34, MAP Signal Too High