TPMS Sensor Battery Low
What does C0194 mean?
The C0194 code means the vehicle's onboard diagnostic system has detected: TPMS Sensor Battery Low. This is a low severity code.
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
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Scan TPMS module for sensor battery status
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Use TPMS tool to check battery level of each sensor
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Note age of TPMS sensors based on manufacture date
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Check if multiple sensors are showing low battery
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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.