Code
C1941
MITSUBISHI
C — Chassis
Tire ID reception fail,Tire4
Views:
UK: 11
EN: 20
RU: 15
AI status
Completed
Completed
100%
Causes
- Failed or depleted battery in Tire 4 sensor
- Damaged or defective TPMS sensor (mechanical damage, corrosion)
- Sensor not programmed/learned to the vehicle or ID lost
- Antenna/receiver module fault or poor connector/ground at TPMS ECU
- Intermittent RF interference or wrong sensor frequency (region mismatch)
- Incorrect sensor location or wheel position mapping after service
Symptoms
- TPMS warning light or message on dash
- No tire pressure reading displayed for Tire 4 or a dash/— for that wheel
- Inability to complete TPMS learn/relearn procedure
- Intermittent loss of pressure data from one wheel
- Possible audible chime or persistent warning until corrected
What to check
- Retrieve stored TPMS codes and freeze frame data with a diagnostic tool
- Use a TPMS activation/scanner tool to attempt to read the Tire 4 sensor ID, pressure, temperature, and battery status
- Verify that sensor IDs stored in the vehicle match the sensors mounted on each wheel
- Visually inspect wheel and sensor for damage or corrosion; check valve cap and nut
- Inspect TPMS antenna(s) and wiring near chassis hubs and the receiver/module for damage, corrosion, loose connectors, and proper grounding
- Attempt a TPMS sensor activation at different wheel speeds or by placing vehicle on lift to confirm consistent non-response
Signal parameters
- TPMS RF frequency (commonly 315 MHz or 433 MHz depending on market)
- Sensor ID (unique hexadecimal/decimal identifier)
- Sensor battery voltage/status (if available from tool)
- Tire pressure (kPa/psi) reported by sensor
- Tire temperature (°C/°F) reported by sensor
- RSSI / signal strength (if reported by diagnostic tool)
Diagnostic algorithm
- Connect a capable diagnostic/TPMS tool and read DTCs and live TPMS data. Confirm C1941 and note any additional related codes.
- Use the TPMS tool to attempt to read the sensor at Tire 4. Record sensor ID, pressure, temperature, and battery status if present.
- If the sensor responds, confirm the ID matches the vehicle’s stored ID for Tire 4. If mismatched, perform the manufacturer TPMS learn/relearn procedure or program the correct ID.
- If the sensor does not respond, try to activate it with the scanner while the wheel is accessible. Attempt activation at different wheel positions or with the wheel off the vehicle to rule out wheel mounting interference.
- Swap the suspected Tire 4 sensor to another wheel position and re-scan. If the identifier/fault moves with the sensor, replace the sensor. If the fault stays at the same wheel position, investigate antenna/receiver/module or wiring.
- Inspect and test antenna/coax/wiring and connectors between the wheel area antennas and TPMS receiver module for continuity, damage, corrosion and proper grounding.
- Verify vehicle software/ECU updates from manufacturer; some models require module reprogramming for new sensors.
- If sensor battery is low or sensor is non‑responsive, replace the TPMS sensor and perform TPMS learn/relearn procedure per factory instructions.
- Clear DTCs and road-test. Re-scan to verify no recurrence and confirm proper pressure readings for all four wheels.
- If problem persists after sensor replacement and wiring/antenna checks, consider replacement/repair of TPMS receiver/module or consult manufacturer technical service information.
Likely causes
- Dead/weak sensor battery (most common with older sensors)
- Defective sensor that will not respond to activation
- Sensor ID not learned after tire/service or after rotating tires
- Poor antenna/receiver connection or module fault
Fault status
Status
TPMS Tire ID reception failure detected for Tire 4 — sensor ID/data not received or not recognized by TPMS control unit.
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
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