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U1543 Alfa Romeo Auto Trouble Code

U1543 Alfa Romeo Auto Trouble Code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

The crank but won't start condition, along with the trouble codes may make you think you've got a PATS anti-theft system problem. However, Ford reports that these codes are all related to software bugs. The only way around the problem is to reprogram the PCM with the latest software.

U1543 Alfa Romeo Possible Solution:

Power Steering Pressure (PSP) Switch Signal Malfunction The PCM counts the number of times vehicle speed transitions from 0 to a calibratable speed. After a calibratable number of speed transitions the PCM expects that the PSP input should have changed. This DTC is set if the transition is not detected. Vehicle towed with engine running Power steering hydraulic concern was repaired but DTC was not erased PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged Check, if possible, if vehicle was towed or power steering service was performed. Observe PSP V PID while checking wires for intermittents.

U1543 Alfa Romeo Description For All Models :

• Alfa Romeo 145
• Alfa Romeo 146
• Alfa Romeo 147
• Alfa Romeo 149
• Alfa Romeo 155
• Alfa Romeo 156
• Alfa Romeo 159
• Alfa Romeo 1600
• Alfa Romeo 164
• Alfa Romeo 166
• Alfa Romeo 175
• Alfa Romeo 1750
• Alfa Romeo 179
• Alfa Romeo 1900
• Alfa Romeo 20
• Alfa Romeo 2000
• Alfa Romeo 22
• Alfa Romeo 2300
• Alfa Romeo 2600
• Alfa Romeo 2900
• Alfa Romeo 33
• Alfa Romeo 4c
• Alfa Romeo 66
• Alfa Romeo 6c
• Alfa Romeo 75
• Alfa Romeo 8c
• Alfa Romeo 90
• Alfa Romeo Alfa
• Alfa Romeo Alfasud
• Alfa Romeo Alfetta
• Alfa Romeo Ar
• Alfa Romeo Arna
• Alfa Romeo Berlina
• Alfa Romeo Brera
• Alfa Romeo Concept
• Alfa Romeo Crosswagon
• Alfa Romeo Eagle
• Alfa Romeo Giulia
• Alfa Romeo Giulietta
• Alfa Romeo Gp
• Alfa Romeo Gp159
• Alfa Romeo Graduate
• Alfa Romeo Gt
• Alfa Romeo Gta
• Alfa Romeo Gtv
• Alfa Romeo Junior
• Alfa Romeo Long
• Alfa Romeo Mito
• Alfa Romeo Montreal
• Alfa Romeo Rl
• Alfa Romeo Rm
• Alfa Romeo Rz
• Alfa Romeo Spider
• Alfa Romeo Sportwagon
• Alfa Romeo Sprint
• Alfa Romeo Stelvio
• Alfa Romeo Sz

U1543 Alfa Romeo Trouble Repair : When you turn on the ignition, the Service Engine Soon or Check Engine U1543 Alfa Romeo light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. You'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the car!

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