P0947 Fault Code

Hydraulic Pump Relay Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0947 fault code indicates an issue with the hydraulic pump relay circuit, specifically that it is operating at a low voltage level. This can affect the hydraulic system's performance and result in various symptoms depending on the vehicle's make and model.

• The hydraulic pump is essential for the operation of systems such as power steering and transmission fluid pressure.
• A malfunction in this circuit can impact vehicle handling and transmission function.

What are the symptoms of the P0947 code?

Drivers may experience a range of symptoms if the P0947 fault code is triggered:

• Difficulty steering due to insufficient power steering pressure.
• Transmission shifting issues such as slippage or delayed shifts.
• Warning lights illuminating on the dashboard, indicating a fault in the hydraulic system.
• Unusual noises from the power steering pump indicating strain or low fluid conditions.

What causes the P0947 code?

Several factors can lead to a low voltage condition in the hydraulic pump relay circuit:

• A defective hydraulic pump relay, which may fail to send the correct voltage to the pump.
• Wiring issues such as shorts, open circuits, or corrosion in the connectors.
• A failing hydraulic pump that draws excessive current, thereby dragging down the circuit voltage.
• Problems with the vehicle's electrical system, including a weak battery or failing alternator.

How to fix P0947?

To resolve the P0947 fault code, follow these steps:

1. Inspect the hydraulic pump relay for proper functioning. Replace if faulty.
2. Check all wiring and connectors for signs of wear, corrosion, or damage. Repair or replace as necessary.
3. Test the hydraulic pump to ensure it is operating correctly and within the normal range of current draw.
4. Examine the vehicle's battery and charging system to ensure they are providing the necessary voltage to the circuit.
5. Clear the fault code and conduct a test drive to verify that the issue has been resolved and no further codes are present.