Safe to drive; check the tire's pressure by hand. C0755 is a chassis code that flags a problem with the tire pressure monitoring (TPMS) sensor. On General Motors vehicles it is corner-specific and identifies the right-front wheel sensor, which the module has stopped receiving valid radio signals from — usually a dead sensor battery, a failed sensor, or a mislocated sensor after a tire rotation.
What C0755 means
C-band codes are defined by each carmaker rather than by one global standard, so the exact wording behind C0755 depends on the make. On GM the code is part of a set of four corner-specific TPMS faults: C0750 covers the left-front wheel, C0755 the right-front, C0760 the left-rear, and C0765 the right-rear. Each wheel carries a battery-powered sensor that measures pressure and transmits it by radio to a receiver module (on many GM models the remote-control door-lock receiver, or RCDLR). As road speed rises, a small roll switch inside each sensor closes and puts it into a faster "rolling" transmit mode. Once the vehicle is moving above roughly 40 km/h (25 mph), the module expects every sensor to check in. If the right-front sensor goes silent for an extended period, or reports a low internal battery, the module cannot confirm that corner and sets C0755. A companion sub-code (for example the "08" variant) marks the signal as invalid rather than simply missing. Because the label is make-specific, always confirm the exact C0755 definition from that vehicle's own service data before condemning a part.
Symptoms
- TPMS warning icon flashes at start-up, then stays lit after the cluster bulb check
- Driver information center shows dashes instead of a pressure value for the affected corner, or a 'service tire monitor' message
- One tire's live pressure reading is missing while the other three display normally
- System cannot complete a sensor relearn, or the right-front position fails to register
- No obviously flat tire, yet the warning light will not clear after a drive
Common causes
- Dead or dying sensor coin-cell battery (most common on sensors more than ~5-7 years old; sets the code but often no low-pressure light)
- Failed or physically damaged sensor from a previous tire service, flat-tire event, or curb impact
- Sensor mislocated after a tire rotation without a relearn, so the reported corner no longer matches the physical wheel
- Radio interference from aftermarket electronics, or blockage of the signal by metallic window tint or wheel components
- Aftermarket wheels whose valve-stem position or non-original sensor prevents reliable transmission, or tire sealant clogging the sensor port
- Faulty receiver module (RCDLR) unable to read otherwise-good sensors
Severity & driving advice
Severity: Low — The car drives normally, but the affected corner's pressure is no longer monitored, so check that tire manually and repair when convenient.
Can I drive? Safe to drive; check the tire's pressure by hand.
Diagnostic approach
- Confirm the code and the corner — Read the full descriptor with a scan tool that decodes GM chassis codes, and note whether it is the base fault or the signal-invalid sub-variant. On GM, C0755 points specifically at the right-front wheel. Check the module's live data list for that sensor's transmit status and battery condition before touching anything, since a low-battery sensor sets the code without lighting the low-pressure warning.
- Activate and test the right-front sensor — Use a TPMS activation tool (GM's is the J-46079) to trigger the right-front sensor, holding the antenna within about 15 cm (6 in) of the stem and aimed upward. A healthy sensor should return its 8-digit ID, a plausible pressure reading (the tool tolerance is roughly 27.6 kPa / 4 psi), a valid learn/mode status, and at least a quarter-scale signal strength. The activation may need to be repeated up to three times; if it never responds, the sensor is the likely fault.
- Verify sensor IDs and locations, then relearn — Compare the sensor IDs and positions the tool records against what the receiver module shows. If they disagree, or if a rotation was done without a relearn, run the TPMS sensor learn procedure so each ID maps to its true physical corner. This alone resolves many C0755 cases caused by a mislocated sensor rather than a failed one.
- Check the receiver and rule out interference — If the right-front sensor tests good but the module still will not read it, use the tool's simulate mode to feed known sensor transmissions to the receiver; if the module fails to display all four simulated sensors correctly, the receiver (RCDLR) is suspect. Also inspect for RF interference sources, metallic tint, tire sealant in the valve, or aftermarket-wheel issues that block the signal.
- Road-test to confirm the fix — After replacing or relearning the sensor, clear the code and drive above 40 km/h (25 mph) for more than about two minutes so the sensor enters rolling mode and the module re-confirms it. A current fault clears after one clean ignition cycle once the problem is gone; the stored history entry drops out after roughly 100 clean drive cycles.
Make & model notes
Chevrolet: On Chevrolet models (Silverado, Tahoe, Traverse and similar) C0755 is the right-front TPMS sensor, one of the C0750/C0755/C0760/C0765 corner set. A silent sensor for about 18 minutes above 25 mph, or a low sensor battery, sets it; relearn after any rotation so the ID maps to the correct wheel.
GMC: GMC shares the GM TPMS logic (verified on the Acadia): C0755 = right-front sensor read by the RCDLR receiver. A low-battery sensor triggers the code without lighting the low-pressure lamp, so confirm sensor battery status in the scan-tool data before replacing hardware.
FAQ
Which tire does C0755 refer to?
On General Motors vehicles C0755 is corner-specific and points to the right-front wheel's tire pressure sensor. It belongs to a set of four codes — C0750 for the left-front, C0755 for the right-front, C0760 for the left-rear, and C0765 for the right-rear — so the number itself tells you which sensor the module has lost contact with.
Is it safe to drive with a C0755 code?
Yes, in the short term. The fault only affects tire pressure monitoring, not braking, steering, or the engine, so the vehicle drives normally. The catch is that the right-front tire is no longer being watched automatically, so check its pressure with a gauge and top it up if needed, then get the sensor sorted so the system can warn you again.
Can a dead sensor battery cause C0755?
Very often, yes. TPMS sensors have a sealed internal battery that typically lasts around five to seven years, and when it runs down the sensor stops transmitting. On GM this sets the corner code but usually does not light the low-pressure warning. Because the battery cannot be replaced separately, the sensor itself is renewed — which is why age is a strong clue.
Do I need to relearn the sensors after fixing C0755?
Yes. After replacing a sensor — and after any tire rotation — run the TPMS relearn procedure so the receiver maps each sensor ID to its true corner. Skipping this can leave a good sensor reported in the wrong position, which itself can trigger C0755. Finish by driving above 25 mph for a couple of minutes so the module re-confirms all four sensors.