Code
C1930
MITSUBISHI
C — Chassis
Transmitter BATT.voltage,Tire3
Views:
UK: 9
EN: 18
RU: 9
AI status
Completed
Completed
100%
Causes
- Aging or dead TPMS sensor battery in the sensor at wheel/tire position 3
- Failed or damaged TPMS sensor (internal fault, water intrusion, mechanical damage)
- Loose or corroded valve/sensor assembly causing intermittent contact (if serviceable)
- Aftermarket or incompatible replacement sensor with incorrect frequency or ID
- Faulty TPMS receiver/module, antenna, or wiring/connectors
- Interference or loss of RF reception (shielding, wheel cover, heavy corrosion)
Symptoms
- TPMS warning light or message illuminated on instrument panel
- No tire pressure reading or an invalid/blank value for tire 3
- Intermittent TPMS alerts for tire 3
- Inability to complete TPMS relearn for that wheel position
- Occasional false low-pressure warnings
What to check
- Read stored DTCs and freeze frame with a diagnostic scan tool that supports TPMS
- Use a TPMS service tool to read the transmitter ID and reported battery voltage for tire 3
- Check live data: confirm sensor ID, battery voltage, signal strength and pressure values for all four wheels
- Visually inspect the sensor/valve at wheel 3 for damage, corrosion, or loose hardware
- Verify vehicle battery voltage and ground connections to TPMS module
- Inspect TPMS receiver/module connectors and wiring for corrosion or looseness
Signal parameters
- Typical fresh sensor battery voltage: ~2.6–3.3 V (varies by manufacturer)
- Low condition often reported when transmitter battery falls below ~2.4–2.6 V
- RF transmission frequency commonly 315 MHz (North America) or 433 MHz (Europe/Asia)
- Transmission interval: periodic reports while driving (roughly 30–60 seconds) or immediate on wake
- Expected data fields: sensor ID, pressure, temperature, battery/voltage indicator, RF signal strength
Diagnostic algorithm
- Connect a capable scan tool, read and record all TPMS-related DTCs and live data.
- Confirm the code is for tire position 3 and note the sensor ID shown in live data.
- Use a TPMS activation/read tool to query the sensor at wheel 3. Record reported battery/voltage and RF response.
- Visually inspect the wheel/removal area for physical damage, corrosion, or a loose valve core. Replace valve core if leaking.
- If the sensor shows low battery or fails to respond, remove the wheel and inspect the sensor body and mounting hardware for damage or corrosion.
- If possible, swap the sensor to another wheel position and re-scan. If the fault follows the sensor, replace the sensor.
- If the sensor responds fine but the vehicle still shows C1930, check TPMS module power, ground, and antenna connections; test for correct voltage and continuity.
- Reprogram or relearn the sensor ID per vehicle procedure after sensor replacement or swap. Clear DTCs and perform a test drive to confirm the code does not return.
- If code persists after replacing sensor and verifying the module, consider module replacement or further RF/antenna diagnostics with manufacturer procedures.
Likely causes
- Sensor battery at end of life (most common)
- Mechanical damage from tire service or corrosion of sensor body/valve
- Sensor ID not learned or mismatched after wheel service
- TPMS module/antenna connector loose or module fault
Fault status
Status
TPMS transmitter battery voltage low or poor transmitter signal detected for tire 3. Replace or test the sensor at wheel 3 and verify TPMS receiver/module operation.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
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