AutoCodes – Generic – C0018

C0018 Code - Left Rear Inlet Control

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Left Rear Inlet Solenoid. Common causes include Faulty Left Rear Inlet Solenoid, Left Rear Inlet Solenoid harness is open or shorted, Left Rear Inlet Solenoid 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: C0018 indicates Left Rear Inlet Control.
Common causes: Common causes include Faulty Left Rear Inlet Solenoid, Left Rear Inlet Solenoid harness is open or shorted, Left Rear Inlet Solenoid 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 6,882

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 May 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0018 Description

The Anti-Lock Brake System (ABS) Module monitors the Left Rear Inlet Solenoid. The ABS Module sets the OBDII code when the Left Rear Inlet Solenoid is not to factory specifications.

OBDII Code C0018 - Left Rear Inlet Control - AutoCodes.com — C0018 Code - Left Rear Inlet Control

What does this mean?

What are the Possible Causes of the DTC C0018?

Faulty Left Rear Inlet Solenoid
Left Rear Inlet Solenoid harness is open or shorted
Left Rear Inlet Solenoid circuit poor electrical connection

How to Fix the DTC C0018?

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 C0018 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 C0018 code?

Need more information on how to fix the C0018 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0018 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0018 Acura — Left Rear Inlet Solenoid Circuit Failure
C0018 Ford — Left Rear Inlet Control
C0018 Honda — Left Rear Inlet Solenoid Circuit Failure
C0018 Lincoln — Left Rear Inlet Control
C0018 Mazda — Left Rear Inlet Solenoid Valve System
C0018 Mercury — Left Rear Inlet Control

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 C0018 Code

1. What are the common symptoms of OBDII code C0018 (Left Rear Inlet Control)?

- Common symptoms include the ABS warning light being illuminated on the dashboard, issues with the vehicle's stability control system, and potential loss of traction control.

2. What are the possible causes of OBDII code C0018 (Left Rear Inlet Control)?

- Possible causes include faulty wheel speed sensors, damaged wiring harnesses, corroded connectors, or issues with the ABS control module.

3. How can I diagnose OBDII code C0018 (Left Rear Inlet Control) on my vehicle?

- Diagnosis typically involves using an OBDII scanner to read the code, inspecting the left rear wheel speed sensor and its wiring for damage, and conducting tests to determine the root cause of the issue.

4. Can I still drive my vehicle with OBDII code C0018 (Left Rear Inlet Control) present?

- It is not recommended to drive your vehicle with this code present, as it can affect the proper functioning of important safety systems like ABS and traction control.

5. How can I repair OBDII code C0018 (Left Rear Inlet Control) on my vehicle?

- Repair options may include replacing the left rear wheel speed sensor, repairing damaged wiring or connectors, or addressing any issues with the ABS control module.

6. Are there any DIY tips for fixing OBDII code C0018 (Left Rear Inlet Control)?

- DIY tips may include checking and cleaning the wheel speed sensor connections, inspecting the sensor for debris or damage, and following manufacturer-specific diagnostic procedures.

7. How long does it typically take to repair OBDII code C0018 (Left Rear Inlet Control)?

- The repair time can vary depending on the exact cause of the code, but it may take anywhere from 1 to 4 hours to diagnose and fix the issue.

8. Can OBDII code C0018 (Left Rear Inlet Control) be a recurring problem?

- Yes, if the root cause of the code is not properly addressed or if there are underlying issues with the vehicle's ABS system, it may recur in the future.

9. Is it safe to reset the OBDII code C0018 (Left Rear Inlet Control) without fixing the underlying issue?

- It is not recommended to simply reset the code without addressing the underlying problem, as it may lead to safety issues and potential failure of the ABS system.

10. Will fixing OBDII code C0018 (Left Rear Inlet Control) improve my vehicle's overall performance?

- Yes, resolving this code can help restore the proper functioning of the ABS and traction control systems, leading to improved safety and performance of your vehicle.