Code
C1954
MITSUBISHI
C — Chassis
Tire air pressure sensor,Tire5
Views:
UK: 6
EN: 13
RU: 10
AI status
Completed
Completed
100%
Causes
- Failed or depleted TPMS sensor battery
- Damaged TPMS sensor or valve stem
- Sensor not transmitting (antenna or electronics failure)
- Sensor ID not learned or ID mismatch after wheel/tire service
- Wiring harness or connector fault to TPMS receiver/ECU
- Intermittent CAN/bus or module communication error
Symptoms
- TPMS warning lamp illuminated on dash
- No pressure or temperature data displayed for Tire 5 in TPMS menu
- Incorrect or fixed pressure value for Tire 5
- Intermittent TPMS warnings or chimes
- Possible slow leak or flat tire at wheel 5
What to check
- Confirm the exact fault code and freeze frame with a capable scan tool or TPMS tool
- Visually inspect wheel 5 valve stem/sensor for damage or corrosion
- Check tire pressure at wheel 5 to rule out actual low pressure
- Use a dedicated TPMS activation/scan tool at wheel 5 to see if the sensor responds and to read sensor ID, pressure, temp, and battery status
- Compare sensor ID to stored IDs in TPMS control module (verify learned ID for Tire 5)
- Inspect wiring and connectors to TPMS receiver/module and check fuses and ground connections
Signal parameters
- RF frequency: typically 315 MHz or 433 MHz (vehicle-dependent)
- Sensor ID: unique 8-10 digit identifier (must match module learned ID for Tire 5)
- Battery voltage: typical internal sensor battery ~2.0–3.6 V (readable on some scan tools)
- Reported tire pressure: value in kPa or psi from the sensor
- Reported tire temperature: degrees C/F (if supported)
- Transmit interval: on-vehicle movement or wake-up event, intermittent periodic transmission
Diagnostic algorithm
- Read and record C1954 with a diagnostic scan tool. Note any additional TPMS or network codes.
- Verify actual tire pressure at wheel 5 and inspect for leaks or visible damage. Inflate to spec if low and recheck.
- Use a TPMS activation/scan tool at wheel 5 to attempt to read the sensor’s ID, pressure, temperature, and battery info. If the sensor responds, record values.
- If the sensor does not respond, move the scan tool around the wheel and valve stem to ensure correct positioning. Try activating the sensor after driving ~10–15 minutes to wake it.
- If the sensor responds but ID does not match the module’s stored ID for Tire 5, perform the manufacturer’s TPMS relearn/registration procedure and clear codes.
- If the sensor fails to respond or shows low/no battery, remove the wheel and inspect the sensor and valve stem for damage or corrosion. Replace the sensor if faulty.
- If replacing the sensor, install OE-compatible sensor (correct frequency and ID format), perform sensor registration/relearn, and reset TPMS codes.
- If sensor replacement does not clear the fault, inspect wiring, connectors, fuses, and the TPMS receiver/module. Check for CAN/communications errors and repair as needed.
- After repairs or relearn, clear codes, road-test the vehicle to allow sensors to transmit, and re-scan to confirm the fault is resolved.
Likely causes
- Dead sensor battery (most common on older sensors)
- Sensor physically damaged during tire service or by corrosion
- Sensor lost from the receiver due to wheel swap without relearn
- Receiver/module not receiving the sensor's RF signal (antenna or wiring issue)
Fault status
Status
Tire air pressure sensor malfunction detected at Tire 5 (TPMS communication or sensor fault). Verify sensor function, battery, ID registration, wiring, and TPMS module communication.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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