Code
C1934
MITSUBISHI
C — Chassis
Tire air pressure sensor,Tire3
Views:
UK: 12
EN: 14
RU: 10
AI status
Completed
Completed
100%
Causes
- Failed or weak battery in the Tire 3 TPMS sensor
- Damaged or contaminated sensor (valve stem, housing) from service or corrosion
- Sensor not registered/ID mismatch after wheel swap or sensor replacement
- Intermittent RF interference or poor antenna reception at receiver/ECU
- Faulty TPMS receiver/module or related CAN bus wiring/connectors
- Loose sensor mounting or physical obstruction (seal, rim damage)
Symptoms
- TPMS warning lamp or message illuminated on dash
- No pressure/temperature data displayed for one wheel (Tire 3) or shows “—”
- Intermittent TPMS warnings that may clear and return
- Failure to complete TPMS relearn or registration for that wheel
- Possible repeated low-pressure alerts without actual air loss
What to check
- Confirm actual tire pressure at Tire 3 with a gauge to rule out a true low-pressure condition
- Use a TPMS diagnostic tool/scanner to attempt to read the Tire 3 sensor ID, battery level, pressure and temperature
- Check for other TPMS codes in the TPMS ECU and vehicle body/ABS network (CAN) for communication errors
- Inspect the wheel and valve area for visible sensor damage, corrosion, loose mounting or aftermarket valve caps
- Inspect wiring and connectors to the TPMS receiver/module and check for blown fuses or poor ground
- If available, check RF antenna connections and measure CAN bus activity with a scan tool during a drive cycle
Signal parameters
- Typical transmission frequency: 315 MHz (North America) or 433 MHz (Europe/Asia) depending on vehicle market
- Sensor transmit interval: periodic (minutes) and on wake events (ignition on, wheel spin)
- Sensor ID: unique identifier expected by TPMS ECU; should match learned ID for Tire 3
- Battery nominal: typically ~2.5–3.3 V when new (internal, non-serviceable on many sensors)
Diagnostic algorithm
- Verify and record the current tire pressures for all four tires; inflate Tire 3 to specification if low and recheck code
- Scan vehicle with a TPMS-capable scan tool. Attempt to read the Tire 3 sensor ID, pressure, temperature and battery state. Note any ‘no response’ result
- If the tool reads the sensor on a different wheel position, confirm sensor IDs against ECU expected positions (wheel swap or incorrect mounting possible)
- Perform a TPMS relearn/registration procedure per Mitsubishi service procedure and see if the ECU accepts the Tire 3 sensor ID
- If the sensor does not respond to the diagnostic tool at the wheel, remove the wheel and visually inspect the sensor/valve stem for damage or corrosion
- Try activating the sensor using a trigger tool (scan tool or handheld activator). If it responds, verify data; if not, replace the sensor and re-learn
- If replacement sensor still not recognized, check TPMS receiver/module power, ground, antenna connections, and CAN communication with a scope or scan tool
- Clear codes and road test, confirming stable readings and that the TPMS warning lamp is extinguished
Likely causes
- Dead/low internal battery in the Tire 3 sensor
- Sensor damaged during tire mounting or by corrosion/impact
- Sensor ID lost or not learned after tire rotation/replacement
- Antenna/receiver wiring fault or module failure
Fault status
Status
TPMS sensor (Tire 3) malfunction — no/invalid communication from the sensor or incorrect sensor data received by TPMS ECU.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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