AutoCodes – Cadillac – P1ECC Cadillac

P1ECC Cadillac 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 Cadillac 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 788

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 Cadillac 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 Cadillac - Battery Charger High-Voltage Converter 1 Temperature Sensor Circuit High Voltage - AutoCodes.com — P1ECC Cadillac 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 Cadillac?

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

How to Fix the DTC P1ECC Cadillac?

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 Cadillac 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 Cadillac Code

What does the OBDII code P1ECC mean on a Cadillac?

P1ECC indicates an issue with the Battery Charger High-Voltage Converter 1 Temperature Sensor Circuit, specifically detecting a high voltage condition.

What are the common symptoms of the P1ECC code?

Symptoms may include an illuminated check engine light, reduced charging efficiency, limited EV or hybrid functionality, or erratic vehicle performance.

What causes the P1ECC code to occur?

Common causes include a faulty high-voltage temperature sensor, damaged wiring or connectors in the circuit, or issues with the battery charger or high-voltage converter module.

Can I drive my Cadillac with the P1ECC code active?

Driving with the P1ECC code is not recommended, as it may lead to further damage to the battery or converter system and could cause safety concerns.

How do I diagnose the P1ECC code?

Start by inspecting the wiring and connectors in the temperature sensor circuit for damage or corrosion. Use a diagnostic scanner to check sensor readings and test the high-voltage converter.

What repairs can fix the P1ECC code?

Repairs may include replacing the high-voltage temperature sensor, repairing or replacing damaged wiring or connectors, or servicing the battery charger or converter module.

How much does it cost to repair the P1ECC code on a Cadillac?

Costs vary depending on the specific repair, but sensor replacement typically ranges from $150 to $300, while more complex issues with the converter or charger may exceed $1,000.

Can a software update fix the P1ECC code?

In some cases, a software update for the vehicleâ€™s control module may resolve the issue if itâ€™s related to incorrect sensor calibration or system logic.

How can I prevent the P1ECC code from recurring?

Regular maintenance of the high-voltage system, including inspections of wiring and connectors, can help prevent this code. Avoid exposing the vehicle to extreme temperatures or conditions.

Do I need a professional to fix the P1ECC code?

While basic inspections can be done at home, diagnosing and repairing high-voltage systems should be handled by a qualified technician due to safety risks and system complexity.