C0750Left Front Tire Pressure Sensor
- Generic OBD-II code · Chassis
- Needs a drive cycle to confirm a fix
- How the car detects it
- None of the public code lists carries C0750. GM, however, uses it in its tire pressure monitoring for the left front wheel transmitter, and the Saab 9-5 (2010-2011) and 9-4X service pages define the subcodes: 03 for a weak sensor battery, 29 for a sensor that sends too few telegrams, 39 for an internal sensor defect. The check runs above 40 km/h, when the roll switch in each wheel unit should wake the transmitter; if it stays silent or its data are invalid, the body control module sets the code and the TPMS lamp blinks for a minute, then stays lit. GM bulletin PIC5650M lists C0750 among the effects of radio interference from add-on devices. C0755, C0760 and C0765 cover the other wheels. No evidence ties the code to a cruise control brake switch.
- What you may notice
- TPMS lamp flashes about one minute after start, then stays on
- Dashes instead of a pressure value for the left front tire
- Service tire monitor message in the driver display
- Likely causes
- LikelyBuilt-in battery of the wheel sensor exhausted (subcode 03)
- PossibleSensor damaged during tire service, after a flat or replaced by a valve without sensor
- PossibleRadio interference from aftermarket devices or metallised window tint (GM PIC5650M)
- RareRemote receiver or its antenna unplugged or faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.