OBD code P0945 indicates a fault with the hydraulic pump relay control circuit.
This affects the transmission system.
Symptoms include the Engine Light being ON.
The issue is typically caused by a faulty relay, open/shorted harness, or poor electrical connection.
It’s important to address promptly to prevent transmission problems.
A possible fix involves inspecting and repairing the relay, harness, or connections as needed.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the p0945 OBD Code
The vehicle may experience issues with the hydraulic pressure sensor circuit related to fault code P0945.
- Symptoms: Service Engine Soon Warning Light ON.
- Transmission may not shift properly.
- Vehicle may go into limp mode.
- Engine may rev higher than usual.
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Causes of the p0945 OBD Code
P0945 code is typically triggered by issues with the hydraulic pump relay circuit.
- P0945 can be caused by a Faulty Hydraulic Pump Relay.
- An open or shorted Hydraulic Pump Relay harness.
- A poor electrical connection in the Hydraulic Pump Relay circuit.
Fixing Error Code p0945 Step By Step
Repair involves inspecting wiring and connectors for damage or corrosion and replacing as needed.
- To fix OBDII code P0945, start by reviewing the possible causes related to the pressure control solenoid A circuit.
- Visually inspect the wiring harness and connectors associated with the pressure control solenoid.
- Check for any damaged components and ensure the connector pins are not broken, bent, pushed out, or corroded.
- If no visible issues are found, test the resistance of the pressure control solenoid A and replace it if necessary.
- Clear the fault codes from the vehicle’s computer using a scan tool and test drive the vehicle to verify the repair.
Cost Of Fixing p0945 Fault Code
Diagnosing and repairing fault code P0945 typically involves inspecting and possibly replacing the hydraulic pump relay circuit.
The cost to diagnose and fix OBD code P0945 typically ranges from $75 to $150, with an estimated repair time of 1. 0 hour.
Costs depend on labor rates, shop location, and the complexity of the transmission fluid pressure sensor switch circuit.
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Details of the p0945 OBD Code
Code P0945 relates to an issue with the hydraulic pump relay circuit in the automatic transmission.
OBD code P0945 means Hydraulic Pressure Unit Loss of Pressure.
This code is triggered by the Powertrain Control Module (PCM) when it detects a loss of pressure in the hydraulic circuit of the transmission.
The hydraulic pressure unit is responsible for controlling the shifting of gears in an automatic transmission.
When a loss of pressure is detected, it can lead to improper gear shifting and potential transmission issues.
Mechanic’s Tech Notes
Code P0945 relates to an issue with the hydraulic pump relay circuit in the automatic transmission.
To diagnose and fix OBDII code P0945, start by checking the transmission control module (TCM) power and ground using a multimeter.
Ensure proper voltage levels are present.
Use a scan tool to confirm TCM communication over the Controller Area Network (CAN) network.
If communication issues are detected, reprogramming or reflashing the TCM may be necessary.
Additionally, inspect the wiring harness and connectors for any damage, and check for broken, bent, pushed out, or corroded pins.
Address any issues found during the visual inspection to resolve the P0945 code effectively.
FAQ
Common symptoms of OBD code P0945 include the Engine Light ON and possible issues with the Hydraulic Pump Relay or its circuit. Check wiring and connectors for faults.
OBD code P0945 typically appears due to a faulty Hydraulic Pump Relay, open/shorted harness, or poor electrical connection. Inspect and repair related components.
Diagnose and fix OBD code P0945 by checking the hydraulic pump relay and its wiring for faults. Inspect connectors for damage or corrosion.
Wrap Up
If your transmission is acting up and you see OBDII code P0945, it could be caused by a faulty line pressure control solenoid, low transmission fluid level, or a damaged wiring harness in the transmission system.
To address OBDII code P0945, check the transmission fluid level and condition, inspect the wiring harness for any visible damage, and test the line pressure control solenoid for proper operation.
Replace any faulty components as needed to resolve the issue.
