![]() Tip: Most service manuals indicate that this job takes between 5 to 7 hours to complete. Boxed end wrench or ratchet wrench set(s).Part 2 of 3: Replacing the EVAP emissions control canister In this case, the compressor itself is fine, but the usual suspect is the evaporator temperature sensor located under the dashboard. The AC compressor does not work: Another error code that commonly can be mistaken for an AC compressor failure is P-0533, which indicates that the circuit to the AC compressor is too high. If this occurs, you'll have to replace the sensor. However, if the temperature raises and lowers frequently without adjusting the temperature setting on the driver or passenger side, it usually means the sensor is starting to fail. In this case, the sensor will occasionally send correct data, causing the AC system to work fine. When this sensor fails, it does not send accurate information to the ECM which triggers the error code and, most of the time, will disable the AC system.ĪC temperature is inconsistent: On the lines of the warning sign above, inconsistent temperature is often an indicator that the sensor is starting to fail. However, when this function stops instantly, it's typically due to a problem with the temperature sensor found in the AC evaporator. No cold air from the AC system: Usually when a vehicle has a coolant leak on a closed loop system or is running low on refrigerant, the air conditioning system slowly stops blowing cold air into the vehicle. ![]() Noted below are a few of the common warning signs that a problem with the EVAP temperature sensor exists. Beyond completing an OBD-II scan, a bad or failing evaporator temperature switch will produce a few symptoms that can alert the driver of a potential issue that should be serviced. The OBD-II code (P-0535) indicates that an Evaporator Temperature Sensor failure has occurred. The best way of determining that this component is malfunctioning will be to complete an error code download with a scanner. In many cases, when the AC stops blowing hot or cold air, it's due to a malfunction of the EVAP temperature sensor. Most air conditioning problems are related to a sensor or electrical issue especially in modern vehicles. Part 1 of 3: Determining the symptoms of a bad EVAP temperature sensor
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