P1549
Intake Manifold Communication Control Circuit Malfunction
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Check Engine light comes on
- Reduced engine power
- Unstable engine idling
- Increased fuel consumption
- The engine goes into emergency mode
Causes
- Open or short circuit in control circuit
- Intake manifold solenoid valve malfunction
- Problems with the wiring harness or connectors
- Engine control unit malfunction
- Mechanical failure of the system for changing the geometry of the intake manifold
How to Fix
- Check the integrity of the control circuit and connections
- Test the intake manifold solenoid valve
- Inspect the wiring harness for damage
- Check the operation of the system for changing the geometry of the intake manifold
- If necessary, replace faulty components