A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.
Possible causes
- The engine unit software (per a GM bulletin — after remote start)
- The sensor itself
- Sensor connector or wiring: corrosion, an open circuit, a chafed wire
What you can do yourself
- This isn’t urgent: it doesn’t affect driving, but the ECU can’t check for fuel vapor leaks.
- Per GM bulletin 21-NA-092 (Tracker/Trailblazer 1.2 turbo and Trax 1.4 turbo, 2020–2021) the code was set after remote starts: the engine unit is reprogrammed, no parts are replaced.
- Check the fuel cap. On some cars the light comes on if it isn’t closed tightly.
- Clear the code and check whether it returns
OOleg’s tip: check the connector
Often the cause is simple — there is no contact in the connector (plug). Look at the connector from the back: remove the rubber seal and you will see whether a wire is corroded or has come off completely. Corrosion shows up as green deposits. Ideally, gently pull each wire towards you one at a time: a sound wire stays in place, while a corroded one simply comes off — it needs to be repaired.
Unplug and inspect connectors with the ignition off.
This is the GM meaning (Chevrolet, Cadillac, GMC). On other makes this number means something else: if your car isn’t made by GM, change the make at the top.
Source: GM 21-NA-092 (static.nhtsa.gov)
The explanation comes from the error code reference in the AvtoElektrik PRO app.