P106B on Fiat: How to Diagnose & Fix
Manufacturer-Specific Powertrain Sensor/Solenoid Fault
1 Fiat model · 1 documented issue · 1 critical · $800-$1,400 repair
P106B on Fiat by model: symptoms, diagnosis and fix
The MultiAir electro-hydraulic valve actuation system can fail, causing rough idle, misfires, and check engine light with codes P0014 or P1014. This is a common failure on the 1.4L MultiAir engine, often occurring between 40,000 and 80,000 miles.
Common Symptoms
- Rough idle
- Engine misfire
- Check engine light
- Reduced power
- Ticking noise from engine
How to Fix
Replace the MultiAir actuator unit on top of the cylinder head. Use updated Mopar part number for revised design.
Sources for this issue (1)
P106B code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P106B mean on a Fiat?
P106B stands for "Manufacturer-Specific Powertrain Sensor/Solenoid Fault." P106B is a manufacturer-specific powertrain code whose meaning varies significantly by maker, so it should not be read as a single fixed fault. Reported definitions include a cylinder 4 oil-supply solenoid valve timing fault (Chrysler/Fiat group), a fuel pressure regulator performance issue (some Honda/Toyota references), a throttle valve stuck/hard-to-move condition (some VW references), and pressure-sensor correlation faults on others. Because of this, the specific circuit must be confirmed with make-and-model service data before repair. On Fiat it is documented across 1 model: 500.
What are the most common causes of P106B?
The most common causes of P106B are: Oil supply/control solenoid valve fault (Chrysler/Fiat group), Fuel pressure regulator or fuel system performance issue (some makes), Throttle body/valve sticking or contamination (some VW), Pressure sensor or sensor-correlation fault, Wiring, connector, or ground problems in the affected circuit, Low or dirty engine oil (oil-solenoid variants), Faulty PCM/ECM. The specific cause varies by vehicle.
How much does it cost to fix P106B on a Fiat?
Published repair estimates on Fiat range from $800 to $1,400 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P106B on a different make?
View P106B across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.