AutoCodes – Generic – C1AE1

C1AE1 Code - Ultrasonic Sensor Front Left Corner Sensor

Quick Answer

The No. Common causes include Faulty No, 1 Ultrasonic Sensor (Front Left [LH] Corner Sensor), No. 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: C1AE1 indicates Ultrasonic Sensor Front Left Corner Sensor.
Common causes: Common causes include Faulty No, 1 Ultrasonic Sensor (Front Left [LH] Corner Sensor), No.
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 1,230

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 Mar 14, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code C1AE1 Description

The No. 1 Ultrasonic Sensor (Front Left [LH] Corner Sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 Ultrasonic Sensor (Front Left [LH] Corner Sensor). If the No. 1 Ultrasonic Sensor (Front Left [LH] Corner Sensor) has an open circuit or other malfunction, it will not function normally.

OBDII Code C1AE1 - Ultrasonic Sensor Front Left Corner Sensor - AutoCodes.com — C1AE1 Code - Ultrasonic Sensor Front Left Corner Sensor

What does this mean?

What are the Possible Causes of the DTC C1AE1?

Faulty No. 1 Ultrasonic Sensor (Front Left [LH] Corner Sensor)
No. 1 Ultrasonic Sensor harness is open or shorted
No. 1 Ultrasonic Sensor circuit poor electrical connection
Faulty Clearance Warning ECU Assembly

How to Fix the DTC C1AE1?

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 C1AE1 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 C1AE1 code?

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Information for Specific Makes

C1AE1 Lexus — Ultrasonic Sensor Front Left Corner Sensor
C1AE1 Toyota — Ultrasonic Sensor Front Left Corner Sensor

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.