AutoCodes – Buick – P1ECC Buick

P1ECC Buick Code - Battery Charger High-Voltage Converter 1 Temperature Sensor Circuit High Voltage

Quick Answer

The battery charger will diagnose its own systems and determine when a fault condition is present. Common causes include Faulty Battery Charger, Battery Charger harness is open or shorted, Battery Charger 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: P1ECC Buick indicates Battery Charger High-Voltage Converter 1 Temperature Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Battery Charger, Battery Charger harness is open or shorted, Battery Charger 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 755

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 Apr 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1ECC Buick Description

The battery charger will diagnose its own systems and determine when a fault condition is present. Diagnostics and system status is communicated from the battery charger to the hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for Diagnostic Trouble Code (DTC) information. This DTC is for the battery charger are internal measurements that verify the charger is performing properly. The battery charger measures internal voltages, currents, and temperatures and verifies they are within the proper range.

OBDII Code P1ECC Buick - Battery Charger High-Voltage Converter 1 Temperature Sensor Circuit High Voltage - AutoCodes.com — P1ECC Buick Code - Battery Charger High-Voltage Converter 1 Temperature Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1ECC Buick?

Faulty Battery Charger
Battery Charger harness is open or shorted
Battery Charger circuit poor electrical connection

How to Fix the DTC P1ECC Buick?

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 P1ECC Buick 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 P1ECC Buick Code

1. What does OBDII code P1ECC mean on a Buick?

P1ECC indicates an issue with the high-voltage converter 1 temperature sensor circuit, specifically a high voltage condition.

2. What are the symptoms of code P1ECC on a Buick?

Symptoms may include the check engine light turning on, reduced charging system performance, and possible overheating of the high-voltage battery system.

3. What causes code P1ECC to appear on a Buick?

Common causes include a faulty high-voltage converter temperature sensor, damaged wiring or connectors, or a malfunction in the battery charger system.

4. Can I drive my Buick with a P1ECC code?

Driving with this code is not recommended, as it may lead to overheating or further damage to the high-voltage battery and converter system.

5. How is code P1ECC diagnosed?

A technician uses an OBDII scanner to confirm the code, inspects the temperature sensor and wiring for damage, and tests the electrical circuit for proper voltage and resistance.

6. How do you fix the P1ECC code on a Buick?

Repairs may involve replacing the high-voltage converter temperature sensor, repairing or replacing damaged wiring, and recalibrating the system if needed.

7. How much does it cost to fix code P1ECC on a Buick?

The repair cost depends on the specific issue but typically ranges from $150 to $400, including diagnostics and parts replacement.

8. Can a faulty temperature sensor trigger code P1ECC?

Yes, a faulty high-voltage converter temperature sensor is a common cause of this code.

9. Does the P1ECC code affect the high-voltage battery in my Buick?

Yes, this code can impact the proper functioning of the high-voltage battery system and may lead to overheating if not addressed.

10. Can clearing the P1ECC code fix the problem?

Clearing the code without addressing the underlying issue will not fix the problem, and the code will likely return. Proper diagnosis and repair are required.