Camshaft Timing Over-Retarded (Bank 1)
The engine computer is seeing the camshaft timing on bank 1 stay too far behind where it should be. This usually happens from oil flow problems, a failing variable valve timing part, or worn timing components. It can cause rough running, poor power, and higher fuel use.
Short trips may be possible, but performance and fuel economy can be worse. Do not keep driving if the engine runs rough, makes noise, or the warning light starts flashing.
P0012 means the powertrain control module has detected that the intake camshaft on bank 1 is over-retarded, meaning it is lagging behind the commanded timing. The code is commonly related to variable valve timing oil control issues, low or dirty oil, incorrect oil viscosity, a stuck actuator, or timing chain wear. In some cases, a mechanical timing problem or wiring fault can also cause this code.
It means the intake camshaft timing on bank 1 is delayed more than the engine computer expects.
Yes. Low oil, dirty oil, or the wrong oil can keep the variable valve timing system from working correctly.
It may clear temporarily if the problem is intermittent, but it will usually return until the cause is fixed.
It is moderate in severity, but it should not be ignored because it can lead to poor performance and possible engine damage if mechanical timing is involved.