AutoCodes – Generic – P15D5

P15D5 Code - Coolant Pump Undervoltage

Quick Answer

The Engine Control Module (ECM) monitors the Coolant Pump. Common causes include Low Coolant Level, Air in the coolant system, Faulty Water Pump. 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: P15D5 indicates Coolant Pump Undervoltage.
Common causes: Common causes include Low Coolant Level, Air in the coolant system, Faulty Water Pump.
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 1,106

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 Jan 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P15D5 Description

The Engine Control Module (ECM) monitors the Coolant Pump. The ECM sets the OBDII code when the Coolant Pump is not to factory specifications.

OBDII Code P15D5 - Coolant Pump Undervoltage - AutoCodes.com — P15D5 Code - Coolant Pump Undervoltage

What does this mean?

What are the Possible Causes of the DTC P15D5?

Low Coolant Level
Air in the coolant system
Faulty Water Pump
Water Pump harness is open or shorted
Water Pump circuit poor electrical connection

How to Fix the DTC P15D5?

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 P15D5 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 P15D5 code?

Need more information on how to fix the P15D5 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P15D5 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P15D5 BMW — Coolant Pump Undervoltage
P15D5 MINI — Coolant Pump Undervoltage

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.

Frequently Asked Questions about P15D5 Code

1. What are the common symptoms of OBDII code P15D5 (Coolant Pump Undervoltage)?

- The common symptoms include overheating of the engine, illuminated coolant warning light on the dashboard, and reduced or no coolant flow.

2. What are the possible causes of OBDII code P15D5?

- The code P15D5 can be triggered by issues such as a faulty coolant pump, damaged wiring or connectors related to the coolant pump, low coolant levels, or a failing coolant temperature sensor.

3. How can I diagnose the root cause of OBDII code P15D5?

- To diagnose the issue, you can start by checking the coolant level, inspecting the coolant pump for any visible damage, testing the wiring and connectors for continuity, and verifying the operation of the coolant temperature sensor.

4. Can I continue driving my vehicle with OBDII code P15D5 active?

- It is not recommended to drive your vehicle with code P15D5 active, as it can lead to engine overheating and potential damage. It is best to address the issue promptly to avoid further complications.

5. How can I repair OBDII code P15D5 (Coolant Pump Undervoltage)?

- Repairing the code P15D5 typically involves replacing the faulty coolant pump, repairing or replacing damaged wiring and connectors, ensuring proper coolant levels, and addressing any issues with the coolant temperature sensor.

6. Is it possible to reset OBDII code P15D5 without fixing the underlying issue?

- While you can clear the code temporarily, it will likely reappear if the root cause is not addressed. It is important to diagnose and repair the issue causing the code for a lasting solution.

7. Can a DIY enthusiast fix OBDII code P15D5 at home?

- Depending on your skill level and access to tools, you may be able to address some causes of P15D5, such as checking coolant levels. However, diagnosing and repairing issues like a faulty coolant pump may require professional assistance.

8. Are there any preventive measures to avoid OBDII code P15D5 in the future?

- Regularly checking and maintaining your vehicle's cooling system, including coolant levels, the condition of the coolant pump, and wiring integrity, can help prevent issues that may trigger code P15D5.

9. How long does it typically take to repair OBDII code P15D5?

- The repair time for code P15D5 can vary depending on the root cause and complexity of the issue. Simple fixes like topping up coolant may take a short time, while replacing a faulty coolant pump can be more time-consuming.

10. Can OBDII code P15D5 cause permanent damage to the engine if left unaddressed?

- Yes, leaving OBDII code P15D5 unaddressed can lead to engine overheating, which may cause permanent damage such as warped cylinder heads or a blown head gasket. It is crucial to resolve the issue promptly.