AutoCodes – Generic – C2185

C2185 Code - Transmitter ID 5 Not Received

Quick Answer

The Tire Pressure Warning Valve and Transmitters that are installed in the tire and wheel assemblies measure the tire pressures. Common causes include Faulty Tire Pressure Warning Valve and Transmitter, Faulty Tire Pressure Warning ECU and Receiver. 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: C2185 indicates Transmitter ID 5 Not Received.
Common causes: Common causes include Faulty Tire Pressure Warning Valve and Transmitter, Faulty Tire Pressure Warning ECU and Receiver.
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 1,261

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 15, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C2185 Description

The Tire Pressure Warning Valve and Transmitters that are installed in the tire and wheel assemblies measure the tire pressures. The measured values are transmitted to the Tire Pressure Warning ECU and Receiver in the vehicle as radio waves. The ECU compares the measured air pressure values with the air pressure threshold. When the measured air pressure value is less than this threshold, the warning light in the combination meter assembly illuminates.
The Tire Pressure Warning Valve and Transmitters constantly send radio waves to the Tire Pressure Warning ECU and Receiver.
Under the conditions below, the Tire Pressure Warning ECU and Receiver is unable to receive the signals from the Tire Pressure Warning Valve and Transmitters, and a Diagnostic Trouble Code (DTC) is stored.
- Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.
- Devices using similar radio frequencies are used in the vehicle.
- The ID of the tire pressure warning valve and transmitter is mistyped during registration.
- A tire, wheel, and/or transmitter from a different vehicle is installed.

OBDII Code C2185 - Transmitter ID 5 Not Received - AutoCodes.com — C2185 Code - Transmitter ID 5 Not Received

What does this mean?

What are the Possible Causes of the DTC C2185?

Faulty Tire Pressure Warning Valve and Transmitter
Faulty Tire Pressure Warning ECU and Receiver

How to Fix the DTC C2185?

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 C2185 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 C2185 code?

Need more information on how to fix the C2185 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C2185 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C2185 Lexus — Transmitter ID 5 Not Received
C2185 Scion — Transmitter ID 5 Not Received
C2185 Toyota — Transmitter ID 5 Not Received

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 C2185 Code

What does the OBDII code C2185 mean?

The OBDII code C2185 indicates that the vehicle's control module has not received a signal from Transmitter ID 5, which is typically associated with a tire pressure monitoring system (TPMS) sensor.

What are the common symptoms of code C2185?

Common symptoms include a warning light on the dashboard, specifically the TPMS warning light, and possibly inaccurate tire pressure readings.

What could cause the C2185 code to trigger?

Causes may include a dead or faulty TPMS sensor battery, a damaged sensor, poor wiring or connections, or issues with the vehicle's TPMS module.

How can I diagnose the issue related to code C2185?

To diagnose C2185, use an OBDII scanner to confirm the code, inspect the TPMS sensors for damage, check the battery levels, and examine wiring and connections for faults.

Is it safe to drive with code C2185?

While it may be safe to drive, it is not advisable as the TPMS may not be functioning properly, which could lead to driving on under-inflated tires without warning.

What repairs are typically needed for code C2185?

Repairs may involve replacing the faulty TPMS sensor, ensuring the sensor's battery is charged, or repairing any damaged wiring or connections related to the TPMS.

Can I reset the code C2185 myself?

You can reset the code using an OBDII scanner, but if the underlying issue isn't fixed, the code will likely reappear after a short time.

Will replacing the TPMS sensor always fix the C2185 code?

Not necessarily. While replacing the TPMS sensor is a common fix, it is important to ensure there are no other issues, such as wiring problems or a malfunctioning TPMS module, that could also cause the code.

How can I prevent the C2185 code from reoccurring?

Regularly check and maintain your tire pressure monitoring system, replace TPMS sensors proactively as they age, and ensure that the vehicle's battery and connections are in good condition.