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 connector under the rear of the car by the fuel tank: corroded contacts (per a GM bulletin — Equinox 2010–2016, connector X411)
- The yaw and acceleration sensor (built into the airbag module on new GM cars) or its mounting
- CAN bus connector or wire
- Low voltage: a flat battery or corroded terminals
What you can do yourself
- ESP and traction control, and sometimes ABS, may not work. The brakes still work, but without electronic help — on slippery roads brake smoothly and don’t accelerate hard.
- If several lamps are on at once (StabiliTrak, ABS, AWD), inspect the connectors under the rear of the car: per a GM bulletin the connector by the fuel tank corrodes on the Equinox.
- Check the battery and terminals: at low voltage control units lose communication.
Stop and don’t drive on if:
- The red brake light is on, or the brake pedal feels soft or sinks
- The steering became very heavy, or the car pulls to one side when braking
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 PIT5427, PIT5427A (static.nhtsa.gov)
The explanation comes from the error code reference in the AvtoElektrik PRO app.