Cause
Faulty oil level sensor
The sensor reporting engine oil level, faulty so the reading is unreliable. On engines with no dipstick it is the only measurement available, which raises the stakes considerably — a driver with no way to check independently has to believe it.
The asymmetry is what matters. Reading high on a low sump means no warning while the engine runs short of oil, which is the failure that destroys engines. Reading low on a correct sump causes needless topping up, and an overfilled engine aerates its oil and can damage the catalytic converter through the breather — so acting on a wrong low reading is itself harmful.
Many of these are combined level and temperature units in the sump, and they read by ultrasound or capacitance, so sludge or a coating on the sensor produces a plausible wrong value. Verify against a known quantity: drain and refill with the specified amount and see whether the reading agrees. A reading that never changes across an oil change is the clearest evidence of a failed sensor rather than a genuine level problem.
Typically a moderate job.
Some of these codes mean you should stop driving
1 of the 3 codes this can cause indicate a fault where continuing to drive risks damage or is unsafe. Which one you have matters more than the cause does — read the code's own page before deciding.
Codes this can cause (3)
Codes where this is a likely explanation first, rather than merely a possible one.
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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