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Home / DTC / C1944 — Tire air pressure sensor,Tire4

C1944 — Tire air pressure sensor,Tire4

Detailed page for trouble code C1944.

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Code

C1944

MITSUBISHI C — Chassis

Tire air pressure sensor,Tire4

Brand: MITSUBISHI
Type: C — Chassis
AI status
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Page language: EN

Causes

  • Failed or faulty TPMS sensor at Tire4
  • Depleted sensor battery (end of life)
  • Sensor not registered/recognized by TPMS control module
  • Physical damage to sensor or valve stem (corrosion, broken antenna)
  • Intermittent or blocked RF reception (antenna/module fault)
  • Faulty TPMS control module or antenna wiring/connectors

Symptoms

  • TPMS warning lamp illuminated on instrument panel
  • No pressure value shown or “—” for Tire4 in vehicle display
  • Inaccurate or missing pressure/temperature reading for Tire4
  • Intermittent TPMS warnings or re-occuring C1944 after clearing codes
  • Possible communication-related faults in instrument cluster or gateway in conjunction with TPMS errors

What to check

  • Connect an appropriate diagnostic scanner capable of reading Mitsubishi TPMS DTCs and live data
  • Retrieve freeze-frame and confirm DTC details (confirm it references Tire4 and any associated faults)
  • Check TPMS live data: verify which sensors are reporting, compare IDs and pressures
  • Visually inspect the wheel/valve stem at Tire4 for damage, corrosion or obvious sensor problems
  • Use a dedicated TPMS tool to query the sensor at Tire4 and read sensor ID, pressure, temperature, battery voltage and signal strength
  • Check antenna/receiver module power, ground and connector integrity (refer to vehicle wiring diagram for locations)

Signal parameters

  • RF frequency: typically 315 MHz (North America) or 433 MHz (Europe/Asia) depending on region
  • Sensor message contents: sensor ID, tire pressure (kPa or psi), temperature (°C/°F), battery voltage, and status bits
  • Typical battery voltage: ~3.0 V new; end-of-life often
  • Transmission rate: periodic transmissions when vehicle is moving; wake-on-movement or valve activations during service
  • Signal strength: RSSI varies by tool; low RSSI indicates reception issues

Diagnostic algorithm

  1. Read and record the C1944 code and any other TPMS or network codes with a factory-capable scan tool.
  2. Check TPMS live data and confirm Tire4 is missing or reporting abnormal values (battery voltage, pressure, temp).
  3. Use a TPMS activation tool at Tire4 to attempt to read the sensor ID, battery voltage and RF signal. If tool reads sensor OK, note ID and parameters.
  4. Visually inspect the wheel, valve stem and sensor for damage, corrosion or physical interference. Remove tire if necessary.
  5. If the sensor cannot be read, swap the sensor/wheel with another corner and re-scan: if the code follows the sensor ID, replace the sensor; if it remains at Tire4, suspect receiver/antenna or wiring.
  6. Check power/ground/fuses/connectors to the TPMS receiver module or antenna unit; repair any wiring faults.
  7. If the sensor is serviceable, attempt a sensor re-learn/registration procedure per manufacturer instructions (some sensors require reprogramming in the ECU).
  8. Replace the TPMS sensor if battery is low, sensor is damaged, or it fails to respond. After replacement or repair, perform TPMS relearn/registration and clear codes.
  9. Road test to confirm the new sensor reports correctly and the DTC does not return. Re-check diagnostic tool for pending codes.

Likely causes

  • Dead/low battery in Tire4 sensor (most common)
  • Sensor damaged during tire change or by corrosion
  • Sensor ID lost or not taught to the receiver during wheel service
  • Receiver/antenna wiring fault or poor ground causing loss of RF reception

Fault status

⚠️ Status
TPMS sensor fault — Tire4 not reporting or out of specification (possible dead sensor, RF/antenna issue, or registration fault).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

C1940 C1941 C1942 C1943 C1950
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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