The P0947: Hydraulic Pump Relay Circuit Low refers to an issue where the voltage in the hydraulic pump relay circuit is lower than expected. This can lead to improper operation of the hydraulic pump, affecting the transmission’s hydraulic pressure.
P0947 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0947: Hydraulic Pump Relay Circuit Low |
| Is it serious? | Yes, low voltage in the hydraulic pump relay circuit can cause transmission malfunctions due to insufficient hydraulic pressure. |
| Possible causes | – Low voltage in the hydraulic pump relay circuit – Faulty hydraulic pump relay – Wiring or connector issues |
| How to diagnose? | – Check the circuit for low voltage – Inspect wiring and connectors – Replace the hydraulic pump relay if necessary |
P0947 Meaning
The P0947: Hydraulic Pump Relay Circuit Low code indicates that the voltage in the hydraulic pump relay circuit is below the expected range. This can cause the hydraulic pump to malfunction, resulting in inadequate hydraulic pressure and transmission performance issues.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any additional fault codes that may provide further insight into the issue. | OBD-II Scanner |
| Test the Circuit for Low Voltage | Use a multimeter to check for low voltage in the hydraulic pump relay circuit. Compare the results to the manufacturer’s specifications. | Multimeter |
| Inspect Wiring and Connectors | Inspect all wiring and connectors for damage, corrosion, or disconnections that could be causing low voltage. | Flashlight, Multimeter |
| Check the Hydraulic Pump Relay | Test the hydraulic pump relay for proper operation. Replace the relay if it is faulty or not functioning correctly. | Diagnostic Tool, Replacement Relay |
| Clear the Code and Test Drive | After completing repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to ensure the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the system to ensure the P0947 code does not return after the test drive. | OBD-II Scanner |
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