AutoCodes – Generic – P0945

P0945 Code - Hydraulic Pump Relay Circuit/Open

Quick Answer

The Transmission Control Module (TCM) monitors the Hydraulic Pump Relay. Common causes include Faulty Hydraulic Pump Relay, Hydraulic Pump Relay harness is open or shorted, Hydraulic Pump Relay circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0945 indicates Hydraulic Pump Relay Circuit/Open.
Common causes: Common causes include Faulty Hydraulic Pump Relay, Hydraulic Pump Relay harness is open or shorted, Hydraulic Pump Relay circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 15,505

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0945 Description

The Transmission Control Module (TCM) monitors the Hydraulic Pump Relay. The TCM sets the OBDII code when the Hydraulic Pump Relay is not to factory specifications.

OBDII Code P0945 - Hydraulic Pump Relay Circuit/Open - AutoCodes.com — P0945 Code - Hydraulic Pump Relay Circuit/Open

What does this mean?

What are the Possible Causes of the DTC P0945?

Faulty Hydraulic Pump Relay
Hydraulic Pump Relay harness is open or shorted
Hydraulic Pump Relay circuit poor electrical connection

How to Fix the DTC P0945?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0945 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0945 code?

Need more information on how to fix the P0945 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P0945 Dodge — Hydraulic Pump Relay Circuit/Open

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.