* Low Power Steering Fluid: This is the most common cause. A low fluid level can cause the warning light to illuminate. Even a small leak can cause this intermittent behavior. Check your power steering fluid level immediately. If it's low, you need to find and fix the leak. Don't just top it off; the leak will continue.
* Power Steering Pressure Sensor: This sensor monitors the pressure in the power steering system. A faulty sensor can give false readings, causing the light to flicker on and off.
* Intermittent Electrical Problem: A loose connection in the wiring harness related to the power steering system could cause an intermittent fault. This could be a wire chafing against something, a corroded connector, or a failing sensor.
* Power Steering Pump: While less likely to cause an intermittent problem, a failing power steering pump can cause the light to come on and off, especially as the pump starts to wear. The pump might be struggling to provide adequate pressure intermittently.
* Faulty Power Steering Rack and Pinion: Similar to the pump, a failing rack and pinion can also cause intermittent issues, depending on the nature of the failure.
What to do:
1. Check the Power Steering Fluid: This is the first and easiest step. The fluid should be clean and at the proper level (check your owner's manual). If it's low, look for leaks around the pump, hoses, and rack and pinion.
2. Have it Diagnosed Professionally: Given the intermittent nature of the problem, a professional mechanic with a scan tool is the best bet. The scan tool can read codes from the car's computer that will help pinpoint the exact problem.
Ignoring the problem is risky: Continuing to drive with a potentially failing power steering system can lead to more serious and costly repairs, or even a loss of steering control. Address this issue promptly.
