P1078
Intake Manifold Runner Control System Malfunction High RPM
P1078 is an OBD-II diagnostic trouble code meaning: Intake Manifold Runner Control System Malfunction High RPM. Common causes: damper control solenoid valve malfunction, broken or clogged vacuum hoses. Estimated repair cost: $17–89.
Symptoms
- Reduced engine power at high speeds
- Unstable engine operation during acceleration
- Check Engine Light Illuminates
- Dips in power when sharply pressing the gas pedal
- Increased fuel consumption
Causes
- Damper control solenoid valve malfunction
- Broken or clogged vacuum hoses
- Mechanical jamming of the intake manifold flaps
- Problems with the damper position sensor
- Open or short circuit in control circuit
How to Fix
- Check the condition of vacuum hoses and connections
- Diagnose the operation of the solenoid valve
- Check the damper mechanism for jamming
- Scan the throttle position sensor
- Check the integrity of the electrical control circuit
Related codes
FAQ
What does the P1078 code mean?
P1078 is an OBD-II diagnostic trouble code that indicates: Intake Manifold Runner Control System Malfunction High RPM
What causes a P1078 error code?
The most common causes of P1078 include: Damper control solenoid valve malfunction; Broken or clogged vacuum hoses; Mechanical jamming of the intake manifold flaps; Problems with the damper position sensor.
How do I fix a P1078 diagnostic trouble code?
To fix P1078: Check the condition of vacuum hoses and connections. Diagnose the operation of the solenoid valve. Check the damper mechanism for jamming. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1078?
Limited driving only, diagnose soon
How much does it cost to fix P1078?
The estimated repair cost for P1078 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat