P0133 Alfa Romeo Auto Trouble Code

Parts or components should not be replaced with reference to only a P0133 Alfa Romeo DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

Evaporative emissions systems test for a leak in the fuel tank and associated hoses. To perform the test, the computer pulls a vacuum and checks to see if the vacuum holds. Each car maker uses a different techniques to check, but most often it's some type of fuel tank pressure sensor.

P0133 Alfa Romeo Possible Solution:

Air Conditioning Pressure Sensor (ACP) Insufficient Pressure Change Each time the A/C clutch engages, the PCM is looking for a pressure change in the refrigerant. If the change in pressure is outside of the calibration the DTC will set. A/C system mechanical failure Open ACP or VREF circuit A/C sensor damaged A/C system electrical failure A/C clutch always engaged Verify A/C system function, including refrigerant charge.

Alfa Romeo P0133 Engine Trouble Code Description For All Models :

P0133 meaning and repair processes are the same for all Alfa Romeo models.

After understanding P0133 Alfa Romeo error code for your Alfa Romeo car, now you can repair yourself.
P0133 Alfa Romeo Trouble Repair Process:

P0133 Alfa Romeo code shows that location the body harness connector, located in and around the left hand kick panel area or inside the IP (consult a shop manual for location). Water can leak into the connector from clogged sunroof drains, A-pillar leaks, or windshield or cowling leaks.

p0133 is a very common fault code for the thermostat. If you have this fault it will need to be replaced. I would start with that repair, clear the faults and perform a 30 minute battery reset(disconnect the negative cable off of the battery) and retest the vehicle.

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