C0194 low

TPMS Sensor Battery Low

The C0194 code means the vehicle's onboard diagnostic system has detected: TPMS Sensor Battery Low. This is a low severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: moderate
Estimated cost: $50 - $200 (parts and labor)

Read ABS Codes

BlueDriver Bluetooth Pro Scanner

Basic scanners cannot read ABS codes. BlueDriver reads all systems including ABS, SRS, and transmission through your phone.

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Read ABS Codes

LAUNCH CRP123X (Reads ABS + Chassis)

Basic scanners cannot read ABS codes. This one reads all four systems so you know exactly which sensor failed.

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Common Symptoms

TPMS light on
One tire showing intermittent pressure reading
TPMS sensor signal weak or lost periodically
Warning light comes and goes
Sensor battery low status on scan tool

Probable Causes (Ranked by Likelihood)

TPMS sensor battery nearing end of life Very High
Sensor transmitting more often due to temperature swings High
Manufacturing defect in sensor battery Moderate
Sensor firmware issue draining battery faster Low

Step-by-Step Diagnostic Procedure

Scan TPMS module for sensor battery status
Use TPMS tool to check battery level of each sensor
Note age of TPMS sensors based on manufacture date
Check if multiple sensors are showing low battery
Plan for sensor replacement before complete failure

Frequently Asked Questions

Can I replace the TPMS sensor battery?

No. TPMS sensor batteries are sealed inside the sensor housing and are not replaceable. When the battery dies, the entire sensor must be replaced.

How do I know when my TPMS sensors were installed?

TPMS sensors have a date code stamped on them. If the vehicle still has the original sensors, they are the same age as the vehicle. Replacements should have a service record.

Should I replace sensors proactively?

If your sensors are 7 or more years old and one has failed, it is a good idea to replace all of them during your next tire service to avoid multiple trips for individual failures.