DTC P2407: Notes

DTC P2407 DETECTION & CONDITION POSSIBLE CAUSES

DTC P2407	EVAP system leak detection pump sense circuit intermittent/erratic problem
DETECTION CONDITION	The PCM monitors the pump load current (EVAP line pressure) when the evaporative leak monitor is operating. If the change in pump load current is more than the specification while the PCM obtains the reference current value 6 times , the PCM determines that there is an EVAP system leak detection pump sense circuit intermittent/erratic problem. The PCM monitors the pump load current (EVAP line pressure) when the evaporative leak monitor is operating. If the pump load current is kept less than the maximum pump load current after the PCM obtains the reference current value 6 times , the PCM determines that there is an EVAP system leak detection pump sense circuit intermittent/erratic problem. Diagnostic support note This is an intermittent monitor (EVAP system). The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	EVAP system leak detection pump malfunction Heater malfunction PCM malfunction

DTC P2407

EVAP system leak detection pump sense circuit intermittent/erratic problem

DETECTION CONDITION

The PCM monitors the pump load current (EVAP line pressure) when the evaporative leak monitor is operating. If the change in pump load current is more than the specification while the PCM obtains the reference current value 6 times , the PCM determines that there is an EVAP system leak detection pump sense circuit intermittent/erratic problem.
The PCM monitors the pump load current (EVAP line pressure) when the evaporative leak monitor is operating. If the pump load current is kept less than the maximum pump load current after the PCM obtains the reference current value 6 times , the PCM determines that there is an EVAP system leak detection pump sense circuit intermittent/erratic problem.

Diagnostic support note

This is an intermittent monitor (EVAP system).
The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE