P040

Code PO40:

Wiring Diagram:

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:
PCM turns 'ON' the 'SERVICE ENGINE SOON' 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.