Your Jac J5 engine control system detects a problem, the computer stores the diagnostic trouble
code P0490 in its memory.
To figure out what is wrong with your vehicle you must first extract the P0490 DTC For Jac J5.
Do you have fresh, clean fuel in the tank? If it's empty, fill it up and go! If it's full, check P0490 Jac J5 that the fuel shut-off valve is open and that it is clean. Stale fuel, dirt and debris are the most common cause of outdoor power equipment not starting properly. If you store equipment with untreated gas in the tank, it can lead to engine damage.
P0490 Jac J5 DTC Meaning
Powertrain Code - Problem is related engine, transmission and emissions systems.
SAE - Generic
Fuel And Air Metering (Injector Circuit Malfunctions Only)
TP Sensor Learn Not Complete
Transmission Engaged At High Throttle Angle
While fuel economy was increased, acceleration was seriously compromised, and the loss of engine vacuum led to a dangerous loss of braking assist when the P0490 Jac J5 code system was in four-cylinder mode. In addition to these issues, while the company proposed a hydraulically controlled system that could be switched from within the car, the version they implemented had to be manually changed in the engine compartment using hand tools.