* Low Power Steering Fluid: This is the most common and easiest to check first. Low fluid can cause the pump to work harder, potentially overheating and triggering the check engine light (as the pump's computer-controlled operation might be affected). The low fluid itself would directly cause power steering issues.
* Power Steering Pump Failure: A failing power steering pump can cause low pressure in the system, resulting in both warnings. The pump might be making unusual noises (whining, groaning).
* Power Steering Pressure Sensor Failure: This sensor monitors the pressure in the power steering system. A faulty sensor might send incorrect information to the car's computer, causing both the check engine light and the power steering warning.
* Electrical Issues: A problem with the wiring harness related to the power steering system could cause both lights to illuminate. This could be a short circuit, a broken wire, or a corroded connector.
* Faulty Power Steering Control Module (if equipped): Some vehicles have a dedicated control module for the power steering. A fault in this module could lead to both warnings.
* Belt Problems: A slipping or broken serpentine belt (which drives the power steering pump) would cause immediate power steering failure and, depending on the vehicle's setup, could also trigger the check engine light due to various sensors detecting issues.
What to do:
1. Check the power steering fluid level: This is the easiest and first thing to do. If it's low, add fluid (the correct type for your vehicle) and see if the problem resolves. If it's low, you need to find the leak.
2. Have the car diagnosed: Use a code reader (OBD-II scanner) to retrieve the diagnostic trouble codes (DTCs) stored by the car's computer. These codes will give a more precise indication of the problem. A professional mechanic can then use this information to diagnose and repair the issue accurately. Ignoring the problem could lead to more expensive repairs down the line.
3. Inspect the power steering belt: Check for cracks, fraying, or slippage.
Don't continue driving the vehicle if you have a major power steering issue, as it can be difficult to control the car, especially at low speeds or while parking.
