P0535 A / C Evaporator Temperature Sensor Circuit Malfunction

P0535 – OBD-II Trouble Code Technical Description

Trouble code P0535 indicates a problem with the A/C evaporator temperature sensor circuit.

What does the fault code mean P0535?

Trouble code P0535 indicates a problem with the A/C evaporator temperature sensor. This sensor measures the A/C evaporator temperature and sends the corresponding data to the engine control module (PCM). If the PCM receives a voltage signal from the sensor that is too high or too low, it will generate a P0535 fault code.

Possible reasons

Some possible reasons for the P0535 trouble code:

1. Evaporator temperature sensor malfunction: The most common case is a malfunction of the sensor itself. This may be caused by worn, damaged or corroded contacts.
2. Wiring or connections: Problems with the wiring or connections between the temperature sensor and the engine control module (PCM) can cause the temperature signal to not be transmitted correctly.
3. PCM malfunction: In rare cases, the problem may be due to a problem with the engine control module itself. This may result in incorrect analysis of data from the temperature sensor.
4. Open or short circuit in the circuit: An open or short circuit in the electrical circuit connecting the temperature sensor and the PCM can cause the P0535 code to appear.
5. Problems with the air conditioner evaporator: Incorrect operation or malfunction of the air conditioner evaporator can also lead to this error.

What are the symptoms of a fault code? P0535?

Symptoms for DTC P0535 may include the following:

• Air conditioner malfunction: One of the main symptoms is a non-functioning or malfunctioning air conditioner. If the evaporator temperature sensor is not functioning properly, it may cause the air conditioner to not operate properly or not function at all.
• Unusual sounds from the air conditioner: There may be unusual sounds or noises from the air conditioner as it may be trying to operate incorrectly due to incorrect temperature readings.
• Low air conditioner performance: If the air conditioner turns on but is not performing well or is not cooling the interior effectively, this could also be a sign of a problem with the temperature sensor.
• Check Engine error code appears: When trouble code P0535 appears in the engine control module (PCM), the Check Engine light on the instrument panel will illuminate.

It is important to note that some symptoms may be related not only to the evaporator temperature sensor, but also to other components of the air conditioning system. Therefore, it is recommended to conduct additional diagnostics to accurately determine the cause of the problem.

How to diagnose a fault code P0535?

The following steps are recommended to diagnose DTC P0535:

• Check the status of the evaporator temperature sensor: Start by visually inspecting the evaporator temperature sensor and its wiring. Make sure that the sensor is not damaged or worn and that its connections are not oxidized. If any damage is found, replace the sensor.
• Check the electrical circuit: Using a multimeter, check the circuit between the evaporator temperature sensor and the engine control module (PCM). Make sure there are no opens, shorts or incorrect resistance values. Also check the integrity of the wires and contacts.
• Scan for errors using a diagnostic scanner: Use a diagnostic scan tool to scan for error codes and check if there are other related errors besides P0535 that may help determine the cause of the problem.
• Check the operation of the air conditioner: Check the operation of the air conditioner and its performance. Make sure the air conditioning turns on and cools the interior efficiently. Pay attention to unusual sounds or vibrations.
• Check the refrigerant level: Check the refrigerant level in the air conditioning system. Low refrigerant levels can also cause a P0535 code.
• Check PCM: In rare cases, the problem may be due to a problem with the engine control module (PCM) itself. Perform additional tests to verify PCM functionality.

If after following these steps the cause of the problem is not determined, it is recommended that you contact a professional auto mechanic or service center for further diagnosis and repair.

Diagnostic errors

When diagnosing DTC P0535, the following errors may occur:

• Not checking the sensor status: The error may occur if the evaporator temperature sensor and its connections have not been carefully checked for damage or corrosion. Not checking the sensor condition may result in missing the problem.
• Incorrect interpretation of data: If the data from the temperature sensor was incorrectly interpreted or not taken into account during diagnosis, this may lead to incorrect conclusions about the causes of the malfunction.
• Faulty wiring or connections: If the wiring and connections between the temperature sensor and the engine control module have not been checked, a problem in the electrical circuit may not be detected, which may be the root cause of the error.
• Ignoring other related errors: Sometimes other related errors can cause the P0535 code to appear. Ignoring these errors or misinterpreting their meaning may lead to misdiagnosis.
• Not checking the refrigerant level: If the air conditioning system's refrigerant level has not been checked, this could also be an overlooked cause of the P0535 code, as low refrigerant levels can affect the temperature sensor's performance.

To successfully diagnose the P0535 trouble code, you must ensure that all related components are thoroughly inspected and a comprehensive data analysis is performed to eliminate possible errors and determine the true cause of the problem.

How serious is the fault code? P0535?

Trouble code P0535 is relatively serious because it indicates a problem with the A/C evaporator temperature sensor. A malfunction of this sensor may affect the proper operation of the vehicle's air conditioning system. Air conditioning plays an important role in ensuring comfortable driving, especially on hot days or in high humidity conditions.

If the air conditioner does not work properly, the temperature inside the car may be unpleasant, which can lead to discomfort during the trip. Moreover, if the cause of the P0535 is not corrected, it can cause further damage to the air conditioning system and increase the risk of other problems.

Additionally, if the air conditioning is turned on too often or incorrectly, it can negatively impact your vehicle's fuel economy. Therefore, it is recommended to have the problem related to the P0535 trouble code professionally diagnosed and resolved as soon as possible to avoid further problems and ensure a comfortable and safe driving experience.

What repair will help eliminate the code? P0535?

To resolve DTC P0535, follow these steps:

1. Replacing the air conditioner evaporator temperature sensor: If the evaporator temperature sensor is found to be faulty or damaged, it must be replaced with a new original sensor.
2. Checking wiring and connections: Check the wiring and connections between the temperature sensor and the engine control module. Make sure that the wiring is intact, without corrosion or breaks, and that the connections are strong and reliable.
3. Checking and replacing electrical components: If electrical problems are found, such as opens, shorts, or incorrect resistance values, replace damaged components or make necessary repairs.
4. Checking and cleaning contacts in connectors: Clean the contacts in the connectors associated with the temperature sensor and engine control module to remove any oxides or contamination.
5. Checking the operation of the air conditioner: After replacing the sensor and making any necessary repairs, check the operation of the air conditioning system to ensure that it is functioning correctly and without errors.
6. Reset errors: After completing the repair, reset the fault code using a diagnostic scanner or disconnect the battery for a few minutes to clear the code from the control module's memory.

If the problem persists after following these steps, it is recommended that you contact a qualified auto mechanic or service center for further diagnosis and repair.

What is P0535 Engine Code [Quick Guide]

P0535 – Brand-specific information

Trouble code P0535 refers to the A/C evaporator temperature sensor. This error code can occur on vehicles of various brands. Some of them with their transcripts:

1. Toyota: For Toyota, this code may be referred to as “A/C Evaporator Temperature Sensor Circuit.”
2. Honda: On Honda vehicles, this code may be described as “A/C Evaporator Temperature Sensor Circuit.”
3. Ford: On Ford vehicles, this code may be designated as “A/C Evaporator Temperature Sensor Circuit.”
4. Chevrolet: On Chevrolet vehicles, this code may be interpreted as “A/C Evaporator Temperature Sensor Circuit.”
5. Volkswagen: For Volkswagen, code P0535 can be described as “Evaporator Temperature Sensor Circuit High Input”.
6. BMW: For BMW, this code can be described as “Evaporator Temperature Sensor Circuit High Input”.
7. Mercedes-Benz: On Mercedes-Benz vehicles, this code can be interpreted as “Evaporator Temperature Sensor Circuit High Input.”

These are just a few examples of how P0535 trouble codes can be deciphered on various makes of cars. Each manufacturer may use slightly different terms and descriptions for this code, but the general meaning remains the same - problems with the air conditioner evaporator temperature sensor.