Code
C0750
HUMMER
C — Chassis
Tire Pressure Monitor (TPM) system sensor not transmitting
Views:
UK: 9
EN: 21
RU: 24
AI status
Completed
Completed
100%
Causes
- Dead or weak TPMS sensor battery
- Physically damaged sensor or valve stem assembly
- Sensor not learned/registered to the vehicle TPMS module (after tire service or sensor replacement)
- Faulty TPMS receiver/module or antenna
- Open/short in TPMS receiver power, ground, or antenna wiring/connectors
- CAN/serial communication fault between TPMS module and other modules
Symptoms
- TPMS warning lamp or dash message illuminated
- No tire pressure or temperature displayed for one or more wheels
- ’Tire sensor not found’ or similar message in TPMS module data
- Intermittent TPMS lamp (sensor drops in and out)
- Possible inability to relearn/recognize tire sensors after service
What to check
- Verify vehicle tire pressures and inflate to recommended pressures; note which wheel(s) report missing data
- Use a full-function TPMS scan tool to read TPMS module DTCs, sensor IDs, and live data
- Attempt active sensor interrogation with an RF activation tool at each wheel
- Compare learned sensor IDs in TPMS module against actual installed sensors (scan tool)
- Inspect valve-stem sensors and wheels for physical damage, corrosion, or recent service (tire change/rotation)
- Check TPMS receiver/module for power, ground, and connector corrosion; inspect antenna wiring and connectors
Signal parameters
- RF transmission from sensor containing sensor ID, pressure, temperature and battery status
- Common RF frequencies: region dependent (e.g., ~315 MHz in North America or ~433 MHz in other regions)
- Intermittent transmissions: periodic wake-up and transmit cycles; active transmit when activated by tool or vehicle event
- Sensor battery voltage nominal ~3.0 V (varies by sensor type) — low battery results in reduced transmit range
- TPMS module should receive a valid sensor ID and pressure message for each wheel
Diagnostic algorithm
- Confirm the warning and read C0750 from the TPMS/ABS/body module with a capable scan tool. Note which wheel(s) are reported missing.
- Verify static tire pressures and visually inspect each valve/sensor and wheel for damage or recent service marks.
- Use a TPMS activation tool at each wheel to wake the sensor and observe if the scan tool receives the sensor ID and live data. Record which sensors respond and which do not.
- If a sensor does not respond, swap the wheel/sensor to another corner and re-test to determine if the problem follows the sensor (bad sensor) or stays with the vehicle location (receiver/antenna/vehicle issue).
- Check TPMS module power, ground, and antenna wiring/connectors for continuity, corrosion, or damage. Repair any wiring faults.
- Check for related communication DTCs (e.g., lost comms) and verify CAN/LIN bus integrity if TPMS module data is not accessible.
- If the sensor is non-responsive and wiring and module are good, replace the suspect sensor. After replacement, program or relearn the sensor IDs per vehicle procedure.
- After repair or re-learn, clear codes and perform a road test/activation cycle to confirm stable reception and that the TPMS lamp stays off.
- If replacement sensors transmit but module still reports no data, test/replace the TPMS receiver/module and antenna as required.
Likely causes
- Sensor battery end-of-life or failed sensor
- Sensor not learned after service (ID missing)
- Damaged sensor/valve (corrosion, impact damage)
- Faulty TPMS receiver/module or antenna harness
Fault status
Status
TPMS sensor not transmitting — no valid sensor ID or data received by the TPMS module from one or more wheel sensors.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
C0750
OPEL
C — Chassis
Pressure Sensor Module A Malfunction
Views:
UK: 3
EN: 9
RU: 11
AI status
Completed
Completed
100%
Causes
- Dead or weak TPMS sensor battery
- Physically damaged sensor or valve stem assembly
- Sensor not learned/registered to the vehicle TPMS module (after tire service or sensor replacement)
- Faulty TPMS receiver/module or antenna
- Open/short in TPMS receiver power, ground, or antenna wiring/connectors
- CAN/serial communication fault between TPMS module and other modules
Symptoms
- TPMS warning lamp or dash message illuminated
- No tire pressure or temperature displayed for one or more wheels
- ’Tire sensor not found’ or similar message in TPMS module data
- Intermittent TPMS lamp (sensor drops in and out)
- Possible inability to relearn/recognize tire sensors after service
What to check
- Verify vehicle tire pressures and inflate to recommended pressures; note which wheel(s) report missing data
- Use a full-function TPMS scan tool to read TPMS module DTCs, sensor IDs, and live data
- Attempt active sensor interrogation with an RF activation tool at each wheel
- Compare learned sensor IDs in TPMS module against actual installed sensors (scan tool)
- Inspect valve-stem sensors and wheels for physical damage, corrosion, or recent service (tire change/rotation)
- Check TPMS receiver/module for power, ground, and connector corrosion; inspect antenna wiring and connectors
Signal parameters
- RF transmission from sensor containing sensor ID, pressure, temperature and battery status
- Common RF frequencies: region dependent (e.g., ~315 MHz in North America or ~433 MHz in other regions)
- Intermittent transmissions: periodic wake-up and transmit cycles; active transmit when activated by tool or vehicle event
- Sensor battery voltage nominal ~3.0 V (varies by sensor type) — low battery results in reduced transmit range
- TPMS module should receive a valid sensor ID and pressure message for each wheel
Diagnostic algorithm
- Confirm the warning and read C0750 from the TPMS/ABS/body module with a capable scan tool. Note which wheel(s) are reported missing.
- Verify static tire pressures and visually inspect each valve/sensor and wheel for damage or recent service marks.
- Use a TPMS activation tool at each wheel to wake the sensor and observe if the scan tool receives the sensor ID and live data. Record which sensors respond and which do not.
- If a sensor does not respond, swap the wheel/sensor to another corner and re-test to determine if the problem follows the sensor (bad sensor) or stays with the vehicle location (receiver/antenna/vehicle issue).
- Check TPMS module power, ground, and antenna wiring/connectors for continuity, corrosion, or damage. Repair any wiring faults.
- Check for related communication DTCs (e.g., lost comms) and verify CAN/LIN bus integrity if TPMS module data is not accessible.
- If the sensor is non-responsive and wiring and module are good, replace the suspect sensor. After replacement, program or relearn the sensor IDs per vehicle procedure.
- After repair or re-learn, clear codes and perform a road test/activation cycle to confirm stable reception and that the TPMS lamp stays off.
- If replacement sensors transmit but module still reports no data, test/replace the TPMS receiver/module and antenna as required.
Likely causes
- Sensor battery end-of-life or failed sensor
- Sensor not learned after service (ID missing)
- Damaged sensor/valve (corrosion, impact damage)
- Faulty TPMS receiver/module or antenna harness
Fault status
Status
TPMS sensor not transmitting — no valid sensor ID or data received by the TPMS module from one or more wheel sensors.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email