AutoCodes – Lexus – C2198 Lexus

C2198 Lexus Code - Initialization Switch for Test Mode DTC

Quick Answer

During test mode, when the tire pressure warning reset switch is on, the tire pressure warning light comes on and when the tire pressure warning reset switch is off, the tire pressure warning light blinks at 0.125-second intervals. Common causes include Faulty Tire Pressure Warning Reset Switch, Tire Pressure Warning Reset Switch harness is open or shorted, Tire Pressure Warning Reset Switch 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
C2198 Lexus indicates Initialization Switch for Test Mode DTC.
Common causes
Common causes include Faulty Tire Pressure Warning Reset Switch, Tire Pressure Warning Reset Switch harness is open or shorted, Tire Pressure Warning Reset Switch 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 978
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 21, 2023
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Code C2198 Lexus Description

During test mode, when the tire pressure warning reset switch is on, the tire pressure warning light comes on and when the tire pressure warning reset switch is off, the tire pressure warning light blinks at 0.125-second intervals. The Diagnostic Trouble Code (DTC) will be set when the test mode procedure is performed.
OBDII Code C2198 Lexus - Initialization Switch for Test Mode DTC - AutoCodes.com
C2198 Lexus Code - Initialization Switch for Test Mode DTC

What are the Possible Causes of the DTC C2198 Lexus?

  • Faulty Tire Pressure Warning Reset Switch
  • Tire Pressure Warning Reset Switch harness is open or shorted
  • Tire Pressure Warning Reset Switch circuit poor electrical connection
  • Faulty Tire Pressure Warning ECU and Receiver

How to Fix the DTC C2198 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C2198 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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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 C2198 Lexus Code

1. What does the OBDII code C2198 mean on a Lexus?

The C2198 code indicates an issue with the Initialization Switch for Test Mode, typically related to a malfunction in the test mode circuit or initialization process.

2. What are common symptoms of the C2198 code in a Lexus?

Symptoms may include the activation of warning lights on the dashboard, such as the Check Engine or ABS light, and potential issues with vehicle diagnostics.

3. What causes the C2198 code to appear on a Lexus?

Common causes include a faulty initialization switch, damaged wiring or connectors in the test mode circuit, or a malfunctioning control module.

4. Can I continue driving my Lexus with the C2198 code active?

While the vehicle may still be drivable, it's recommended to address the issue promptly to avoid potential diagnostic or system errors.

5. How do I fix the C2198 code on a Lexus?

Repairs may involve inspecting and repairing the initialization switch, checking for damaged wiring or connectors, and resetting the system using an OBDII scanner.

6. Is the C2198 code related to the ABS system in a Lexus?

Yes, the C2198 code is often associated with the ABS system, as it involves the test mode circuit used for diagnostics.

7. How can I diagnose the C2198 code on a Lexus?

Use an OBDII scanner to confirm the code, then inspect the initialization switch, related wiring, and connectors for damage or faults.

8. Does the C2198 code require replacement of any components?

In some cases, the initialization switch or wiring may need to be replaced if they are found to be faulty during diagnosis.

9. Can a software update fix the C2198 code in a Lexus?

A software update is unlikely to resolve this code, as it typically stems from a hardware issue in the test mode circuit.

10. How much does it cost to repair the C2198 code on a Lexus?

Repair costs vary depending on the extent of the issue, but typically range from $50 to $300 for diagnostics and component replacement.

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