Multiair Valve Actuator Jeep 1.0 b

Typical Defects:
Failure to start one or more cylinders
The vehicle does not start
Engine control system malfunction indicator light is on

Error Codes:
P0300 - Multiple cylinder misfires
P0301 - Cylinder 1 ignition failure
P0302 - Cylinder 2 ignition failure
P0303 - Cylinder 3 ignition failure
P1061 - Solenoid valve signal for cylinder module actuation 1
P1062 - Solenoid valve signal for cylinder module actuation 2
P1063 - Solenoid valve signal for cylinder module actuation 3
P1524 - Anti-fouling function for spark plugs

The MultiAir 68439534AA is an electro-hydraulic actuator for variable control of the intake valves. In the FCA/Stellantis 999 cc 3-cylinder (T3) FireFly Turbo petrol engines, this component allows continuous and independent adjustment of valve lift, optimizing fuel consumption, emissions and performance. The system is supplied by engine oil and electronically controlled by the ECU, with operation closely linked to the quality and regularity of maintenance.

Vehicle applications

Jeep

• Renegade

DIPA recommends always checking the compatibility of the spare part before purchase.

Potential anomalies

• Hydraulic clogging: caused by contaminated oil or neglected maintenance. It can cause loss of pressure, irregular response and malfunction.
• Internal wear: mechanical components such as springs, valves and pistons can deteriorate after 100,000 km, with evident symptoms.
• Solenoid failure: stuck or burnt solenoids cause failure to actuate the intake valve on one or more cylinders.
• Electrical problems: low voltage, faulty wiring or corroded connectors can alter the signal to the solenoids.
• Oil leaks: worn seals or damaged O-rings can lead to system instability and excessive consumption.

Recognizable symptoms

• Running on 2 cylinders
• Engine warning light on
• Stumbling or irregular idle
• Metallic noises or noise when cold
• Limp-home (recovery) mode
• High fuel consumption

Typical defects

Failure to ignite one or more cylinders

The vehicle does not start

Engine control system warning light on

Error codes

P0300 - Multiple cylinder misfires

P0301 - Cylinder 1 misfire

P0302 - Cylinder 2 misfire

P0303 - Cylinder 3 misfire

P1061 - Solenoid valve signal for actuation of cylinder module 1

P1062 - Solenoid valve signal for actuation of cylinder module 2

P1063 - Solenoid valve signal for actuation of cylinder module 3

P1524 - Spark plug fouling prevention function

Technical bulletins and updates

TSB 10.009.21 – Fiat/Jeep

• Concerns Renegade, 500X, Tipo 1.0 T3
• Symptoms: engine warning light on, engine irregularities
• Solution: ECU software update with a new map for optimized management of the MultiAir

Conclusions

DIPA supports customers throughout the entire relationship, from order to after-sales assistance. It can intervene to overhaul these components and restore them to full functionality, saving on replacement costs and benefiting the environment thanks to the circular economy. Also in this case, DIPA technicians' experience is made available to customers for thorough overhauls that perfectly match the condition of a new component.