The P015B is a generic OBD-II powertrain trouble code. Its official definition is “O2 Sensor Delayed Response – Lean to Rich (Bank 1 Sensor 1)”.
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The P015A is a generic OBD-II powertrain trouble code. Its official definition is “O2 Sensor Delayed Response – Rich to Lean (Bank 1 Sensor 1)”.
The P0159 is a generic powertrain diagnostic trouble code. Its official definition is “O2 Sensor Circuit Slow Response (Bank 2 Sensor 2)”.
The P0158 is a generic powertrain diagnostic trouble code. Its official definition is “O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)”.
The P1064 is a P1xxx powertrain diagnostic trouble code, which makes it Manufacturer-Specific (OEM-Defined) — not an SAE/ISO generic code — so its exact “official definition” depends on the brand.
The P1061 is a P1xxx powertrain diagnostic trouble code. Its official definition is “Variable Valve Timing (VVT) / Valvetronic Supply Voltage Control Motor — Supply Voltage Circuit Malfunction / Electrical (Bank 1)”.
The P105B is a P1xxx powertrain diagnostic trouble code. Its official definition is “Variable Valve Timing (VVT) Control Module — Internal Fault, Current / Voltage Too Low” (also documented as Internal Control Module VVT Error, Voltage Too Low).
The P105A is a P1xxx powertrain diagnostic trouble code. Its official definition is “Variable Valve Timing (VVT) Control Module — Internal Fault, Current Too High.