AutoCodes – Lexus – P0ACE Lexus

P0ACE Lexus Code - Hybrid Battery Temperature Sensor 'C' Circuit Intermittent/Erratic

Quick Answer

The battery temperature sensors are provided at 3 locations of the HV battery. Common causes include Faulty HV Battery Assembly (HV battery temperature sensor), HV Battery Assembly harness is open or shorted, HV Battery Assembly 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: P0ACE Lexus indicates Hybrid Battery Temperature Sensor 'C' Circuit Intermittent/Erratic.
Common causes: Common causes include Faulty HV Battery Assembly (HV battery temperature sensor), HV Battery Assembly harness is open or shorted, HV Battery Assembly 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 1,122

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 Jul 28, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0ACE Lexus Description

The battery temperature sensors are provided at 3 locations of the HV battery. The resistance of the thermistor, which is built into each battery temperature sensor, varies in accordance with changes in the HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery smart unit uses the battery temperature sensors to detect the HV battery temperature, and sends the detected value to the power management control ECU. Based on the results of this detection, the power management control ECU controls the blower fan. (The blower fan starts when HV battery temperature rises above a predetermined level.)

OBDII Code P0ACE Lexus - Hybrid Battery Temperature Sensor 'C' Circuit Intermittent/Erratic - AutoCodes.com — P0ACE Lexus Code - Hybrid Battery Temperature Sensor 'C' Circuit Intermittent/Erratic

What does this mean?

What are the Possible Causes of the DTC P0ACE Lexus?

Faulty HV Battery Assembly (HV battery temperature sensor)
HV Battery Assembly harness is open or shorted
HV Battery Assembly circuit poor electrical connection
Faulty Battery smart unit

How to Fix the DTC P0ACE Lexus?

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 P0ACE Lexus 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 P0ACE Lexus Code

1. What are the common symptoms of the OBDII code P0ACE in a Lexus hybrid?

- Common symptoms include poor fuel economy, reduced hybrid system performance, and the illumination of the check engine light.

2. What could be the potential causes of the Hybrid Battery Temperature Sensor 'C' Circuit Intermittent/Erratic code in a Lexus?

- Possible causes may include a faulty hybrid battery temperature sensor, damaged wiring or connectors, or issues with the hybrid battery itself.

3. How can I diagnose the Hybrid Battery Temperature Sensor 'C' Circuit Intermittent/Erratic code in my Lexus?

- Diagnosis typically involves using a scan tool to retrieve the specific code, testing the hybrid battery temperature sensor and related components, and inspecting the wiring for any damage.

4. Is it safe to continue driving my Lexus with the P0ACE code present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the hybrid system and potentially affect drivability.

5. Can I repair the Hybrid Battery Temperature Sensor 'C' Circuit Intermittent/Erratic issue myself?

- While some DIY enthusiasts may attempt the repair, it is recommended to seek professional help due to the complexity of the hybrid system and the specialized tools required.

6. What are the typical repair options for fixing the P0ACE code in a Lexus hybrid?

- Repair options may include replacing the faulty hybrid battery temperature sensor, repairing damaged wiring or connectors, or addressing any underlying issues with the hybrid battery.

7. How much does it cost to repair the Hybrid Battery Temperature Sensor 'C' Circuit Intermittent/Erratic problem in a Lexus?

- The cost of repair can vary depending on the extent of the issue, parts needed, and labor costs. It is advisable to consult a mechanic for an accurate estimate.

8. Will resetting the check engine light resolve the P0ACE code in my Lexus?

- Resetting the check engine light may temporarily clear the code, but it will not fix the underlying issue causing the Hybrid Battery Temperature Sensor 'C' Circuit Intermittent/Erratic problem.

9. How can I prevent the P0ACE code from reoccurring in my Lexus hybrid?

- Regular maintenance, including checking the hybrid system components, ensuring proper wiring connections, and monitoring the hybrid battery's condition, can help prevent the code from reoccurring.

10. Is the Hybrid Battery Temperature Sensor 'C' Circuit Intermittent/Erratic code a common issue in Lexus hybrid vehicles?

- While not extremely common, this code can occur in Lexus hybrid vehicles, especially as they age or if there are issues with the hybrid system components.