AutoCodes – Chevrolet – P15C5 Chevrolet

P15C5 Chevrolet Code - Engine Coolant Bypass Valve Position Sensor Performance - Unexpected Position Change Detected

Quick Answer

The passenger compartment heater coolant control valve regulates the engine coolant flow into the cabin heater loop depending on engine coolant temperature and ambient temperature conditions. Common causes include Faulty Engine Coolant Bypass Valve Position Sensor, Engine Coolant Bypass Valve Position Sensor harness is open or shorted, Engine Coolant Bypass Valve Position Sensor 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: P15C5 Chevrolet indicates Engine Coolant Bypass Valve Position Sensor Performance - Unexpected Position Change Detected.
Common causes: Common causes include Faulty Engine Coolant Bypass Valve Position Sensor, Engine Coolant Bypass Valve Position Sensor harness is open or shorted, Engine Coolant Bypass Valve Position Sensor 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 4,977

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 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P15C5 Chevrolet Description

The passenger compartment heater coolant control valve regulates the engine coolant flow into the cabin heater loop depending on engine coolant temperature and ambient temperature conditions. The passenger compartment heater coolant control valve has two positions: ByPass or Link. In the ByPass position, the coolant in the engine loop and heater loop are separated and in the link position the coolant circulates through both loops. The valve movement is controlled by a PWM signal. A 50% duty cycle is a normal duty cycle. A 75% duty cycle represents a valve commanded to the link position. A 25% duty cycle represents a valve commanded to the ByPass position. The passenger compartment heater coolant control valve uses an internal position sensor that sends a signal to the hybrid powertrain control module to determine the valve position.
When the engine coolant temperature heats up, a valve learn procedure takes place. The hybrid powertrain control module 2 commands the valve to the link position and records the voltage coming back from the position sensor. Then the hybrid powertrain control module 2 commands the valve back to the bypass position and records the voltage coming back from the position sensor. The voltage values in both the link and bypass positions must fall within calibrated ranges.

OBDII Code P15C5 Chevrolet - Engine Coolant Bypass Valve Position Sensor Performance - Unexpected Position Change Detected - AutoCodes.com — P15C5 Chevrolet Code - Engine Coolant Bypass Valve Position Sensor Performance - Unexpected Position Change Detected

What does this mean?

What are the Possible Causes of the DTC P15C5 Chevrolet?

Faulty Engine Coolant Bypass Valve Position Sensor
Engine Coolant Bypass Valve Position Sensor harness is open or shorted
Engine Coolant Bypass Valve Position Sensor circuit poor electrical connection

How to Fix the DTC P15C5 Chevrolet?

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 P15C5 Chevrolet 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.

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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 P15C5 Chevrolet Code

1. What are the common symptoms of the OBDII code P15C5 in a Chevrolet vehicle?

- Common symptoms include engine overheating, reduced engine performance, and the Check Engine light illuminating on the dashboard.

2. What could cause the OBDII code P15C5 to trigger in a Chevrolet?

- The code P15C5 typically triggers due to a faulty engine coolant bypass valve position sensor or an unexpected change in the valve position detected by the sensor.

3. How can I diagnose the OBDII code P15C5 in my Chevrolet?

- Diagnosis involves using an OBDII scanner to retrieve the code, checking the engine coolant bypass valve and its sensor for any physical damage or malfunctions, and inspecting the wiring for any issues.

4. Can I continue driving my Chevrolet with the OBDII code P15C5 present?

- It is not recommended to drive your vehicle with the P15C5 code active, as it can lead to potential engine damage or overheating issues.

5. What are some repair options for fixing the OBDII code P15C5 in a Chevrolet?

- Repair options include replacing the engine coolant bypass valve position sensor, repairing any damaged wiring or connectors, and resetting the code with an OBDII scanner after completing the repair.

6. Is it possible to reset the OBDII code P15C5 in a Chevrolet without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is important to address the root cause of the problem to prevent further issues and potential damage to the vehicle.

7. How much does it typically cost to repair the OBDII code P15C5 in a Chevrolet?

- The cost of repair can vary depending on the specific issue causing the code, but it may range from $100 to $300 for parts and labor.

8. Can a DIY enthusiast fix the OBDII code P15C5 in a Chevrolet at home?

- Depending on your mechanical skills and tools available, you may be able to replace the engine coolant bypass valve position sensor yourself. However, professional diagnosis is recommended for accurate repair.

9. Will the OBDII code P15C5 in a Chevrolet reset on its own after driving for a while?

- The code may temporarily disappear if the issue is intermittent, but it is advisable to diagnose and repair the problem to prevent it from recurring in the future.

10. How can I prevent the OBDII code P15C5 from appearing in my Chevrolet in the future?

- Regular maintenance, such as checking and replacing coolant as needed, inspecting the cooling system components, and addressing any issues promptly, can help prevent the recurrence of the P15C5 code.