C1AA2 Lexus Code - Vehicle Speed Tolerance Malfunction
Quick Answer
For vehicles with Lane Departure Alert System: The Lane Departure Warning Camera receives the vehicle speed tolerance signal from the combination meter assembly via Controller Area Network (CAN) communication to control the lane departure alert system. Common causes include Faulty Lane Departure Warning Camera (For vehicles with Lane Departure Alert System), Faulty Combination Meter Assembly (Lane Departure Alert System [W/ Steering Control]), Faulty Forward Recognition Camera (Lane Departure Alert System [W/ Steering Control]). 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
- C1AA2 Lexus indicates Vehicle Speed Tolerance Malfunction.
- Common causes
- Common causes include Faulty Lane Departure Warning Camera (For vehicles with Lane Departure Alert System), Faulty Combination Meter Assembly (Lane Departure Alert System [W/ Steering Control]), Faulty Forward Recognition Camera (Lane Departure Alert System [W/ Steering Control]).
- 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.
Code C1AA2 Lexus Description
For vehicles with Lane Departure Alert System (W/ Steering Control): The Forward Recognition Camera receives vehicle speed tolerance signals from the Combination Meter Assembly. If the Combination Meter Assembly detects a vehicle speed tolerance malfunction signal, it informs the Forward Recognition Camera via CAN communication, and DTC C1AA2 is stored.
What are the Possible Causes of the DTC C1AA2 Lexus?
- Faulty Lane Departure Warning Camera (For vehicles with Lane Departure Alert System)
- Faulty Combination Meter Assembly (Lane Departure Alert System [W/ Steering Control])
- Faulty Forward Recognition Camera (Lane Departure Alert System [W/ Steering Control])
How to Fix the DTC C1AA2 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.
Code Tech Notes
When replacing the Driving Support ECU Assembly, always replace it with a new one. If a Driving Support ECU Assembly which was installed in another vehicle is used, the information stored in the Driving Support ECU Assembly will not match the information from the vehicle. As a result, a DTC may be stored.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1AA2 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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Frequently Asked Questions about C1AA2 Lexus Code
What does the OBDII code C1AA2 mean for a Lexus?
C1AA2 indicates a "Vehicle Speed Tolerance Malfunction," meaning the vehicle's systems detected inconsistent or abnormal data related to speed sensor inputs.
What are the common symptoms of code C1AA2 in a Lexus?
Symptoms may include the activation of warning lights (like ABS or VSC), erratic speedometer readings, or issues with stability control and cruise control systems.
What causes the C1AA2 code in a Lexus?
Common causes include faulty wheel speed sensors, damaged wiring or connectors in the speed sensor circuit, or problems with the ABS control module.
Can I drive my Lexus with the C1AA2 code active?
It’s not recommended, as the malfunction may impact critical safety systems like ABS and stability control, increasing the risk of an accident.
How is the C1AA2 code diagnosed in a Lexus?
A technician will use a scan tool to read the code, inspect the wheel speed sensors, check the wiring and connectors, and possibly test the ABS control module for faults.
What repairs are typically needed to fix the C1AA2 code?
Repairs may include replacing a faulty wheel speed sensor, repairing damaged wiring, or reprogramming or replacing the ABS control module.
Can a failing wheel speed sensor trigger the C1AA2 code?
Yes, a failing or malfunctioning wheel speed sensor is one of the most common causes of this code.
Does clearing the C1AA2 code fix the issue?
Clearing the code will remove it temporarily, but the underlying problem must be fixed to prevent the code from returning.
How much does it cost to fix the C1AA2 code in a Lexus?
Repair costs vary depending on the issue, but wheel speed sensor replacement typically costs $200 to $400, while ABS module repairs can exceed $1,000.
Can a dirty or corroded wheel speed sensor cause the C1AA2 code?
Yes, dirt or corrosion on the sensor can interfere with its readings and trigger the code, so cleaning it may resolve the problem in some cases.
Discuss the causes and fixes for C1AA2 Lexus OBDII Code
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