P040

DTC P040:

Emission Control Circuit:

DESCRIPTION
This diagnostic test monitors the power steering pressure switch. When a load is placed on the power steering such as full lock, the switch opens. Code P040 sets when vehicle speed is above 45 mph and the switch is open.

TEST CONDITIONS
1. Engine running.

2. Vehicle speed 45 mph or greater.

FAILURE CONDITIONS
Power steering pressure switch open for 15 seconds.

ACTION TAKEN
Powertrain Control Module (PCM) turns "ON" the "Service Engine Soon" Malfunction Indicator Lamp (MIL).

NOTES ON INTERMITTENTS
Manipulate affected wiring while the engine is running. If the fault is induced the code will set and the wiring should be repaired for an intermittent open or short to ground. Disconnect and reconnect the power steering connector and PCM connector and ensure they are latched.