Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2016IMPALA LS, 3.6L ENG VIN NREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISDATA COMMUNICATION SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC U0028: MOST BUSREPAIR VERIFICATION
2016 Chevrolet Impala LS, 3.6L Eng VIN N
Repair Verification
2016 Chevrolet Impala LS, 3.6L Eng VIN NSECTION Repair Verification
- Ignition OFF, all access doors closed, all vehicle systems OFF and all keys at least 3 m (9.8 ft) away from vehicle. It may take up to 2 min for all vehicle systems to power down.
- Install any components or connectors that have been removed or replaced during diagnosis.
- Ignition ON.
- Clear the DTCs.
- Verify the A11 Radio scan tool Surrogate MOST Master Node Upstream Position parameter value is None.
- If the value is not None
Disconnect the A11 Radio power or the battery cables for 1 min to reset this value to None.
- If the value is None
- If the value is not None
- All OK.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.