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.
Intake Valves, Opening Angle (Ca)
The parameter corresponds to the "Camshaft shift angle" but is calculated from another reference position on the crankshaft.
Measurement range between -256CA and +256CA.
The engine control module (ECM) calculates the value using the signals from the engine speed (RPM) sensor (crankshaft position) and the camshaft position (CMP) sensor (camshaft position).
The value indicates when the intake valves open relative to top dead center (TDC) for the cylinders. The value decreases with increased control of the camshaft.
When the camshaft is in its 0-position (camshaft not deployed), the angle is 27°CA. When the camshaft is fully deployed, the angle is -23°CA.
(CA=Crank Angle).
HINT: The value must follow the parameter "Intake valves, target value opening angle".
NO RELATED
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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.