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B1238 Alfa Romeo Auto Trouble Code

B1238 Alfa Romeo OBD2 reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.

Remove the air filter box assembly so you can access the transmission range switch. Turn the key to the ON position, but do not start the vehicle. Move the shifter to the neutral position. Align the alignment holes between the switch and the shift lever. Insert a 5mm drill bit into the adjustment hole to verify the proper alignment for the neutral position.

B1238 Alfa Romeo Possible Solution:

In-line Ford engines, along with those of most other manufacturers, begin the numbering of cylinders at the front and proceed in numerical order toward the back. In the V-engine design, Ford follows a similar design with the number one cylinder at the front left of the engine. In the V-6 configuration, cylinder 4 is at the front right of the engine and in a V-8, cylinder number 5 is in that location. Other manufacturers sometimes use an alternating pattern in the V-engines.

B1238 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

B1238 Alfa Romeo Trouble Repair : The sensors receive a 5 volt reference signal from the PCM. As pressure readings change, the sensor varies the voltage and the computer reads that to determine input. In the case of a broken wire, the sensor never sees the voltage and the computer assumes a major fault. So if you get this B1238 Alfa Romeo code, first check to make sure you're getting a good 5 volt reference signal at the sensor.

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