P0535 OBD-II Trouble Code: A/C Evaporator Temperature Sensor Circuit

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0535 code

P0535 is a diagnostic trouble code (DTC) for "A/C Evaporator Temperature Sensor Circuit". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0535 DIAGNOSTIC Get a fair and transparent estimate upfront

P0535 code definition

The P0535 trouble code detects an issue with the A/C evaporator temperature sensor circuit.

What the P0535 code means

The P0535 code is a standard OBD-II trouble code that signals a problem with the A/C (air conditioner) evaporator temperature sensor. The A/C temperature sensor delivers voltage readings to the powertrain control module (PCM) which monitors the system to make sure it is functioning properly. When the PCM receives variations in the voltage that are higher or lower than they should be, then the P0535 code will be illuminated.

What causes the P0535 code?

The P0535 trouble code is usually the result of a defective evaporator temperature sensor. However, there are a few other potential causes, including:

  • Defective expansion valve, which causes the evaporator core to freeze up
  • Issues with the electrical components, such as shorter or open wires, and damaged or corroded connectors
  • Overcharged A/C system
  • Insufficient refrigerant levels
  • Defective climate control head

What are the symptoms of the P0535 code?

When the P0535 trouble code has been detected, the check engine soon Warning Light will likely illuminate on the dashboard, and the A/C light may flash on the climate controls. In most cases, the air conditioning system will be not function, and in many cases the evaporator case may drip on the vehicle’s interior.

How does a mechanic diagnose the P0535 code?

The P0535 code will be diagnosed using a standard OBD-II trouble code scanner. A reputable mechanic will examine the freeze frame data with the scanner, to assess the code, and check to see if any additional trouble codes are present. The codes should then be reset, and the vehicle should be restarted to see if the code returns. If the code does not return, it is either an intermittent error, or the code has been erroneously detected.

If the P0535 code returns, then the mechanic should begin with a visual inspection of the air conditioning system’s electrical components. All wires, connectors, harnesses, and fuses should be inspected for damage, and replaced if necessary. The mechanic should also check the refrigerant levels to make sure they are sufficient.

After checking the electrical components, the technician should examine the evaporator temperature sensor, as this is the most likely issue. If the sensor itself is not damaged, the valve, and then the climate control head should be inspected

After any component is replaced, the codes should be reset and the vehicle restarted to see if the codes return.

Common mistakes when diagnosing the P0535 code

The most frequently made diagnostic mistake with the P0535 code comes from a failure to comply with the OBD-II trouble code diagnosis protocol. The protocol should be followed step by step at all times, to ensure a proper, thorough, and efficient fix.

It is common for people to assume that the P0535 code is a result of insufficient refrigerant levels, which can lead people to add more refrigerant when the vehicle has enough. This can result in excessive refrigerant, which can cause lots of damage.

How serious is the P0535 code?

A vehicle with the P0535 code triggered is still drivable. However, the air conditioning system probably won’t work, and you never know when you the system will be needed for health or comfort. As a result, the P0535 trouble code should be addressed as soon as you get the chance.

What repairs can fix the P0535 code?

Some of the repairs for a P0535 trouble code are:

Additional comments for consideration regarding the P0535 code

In most vehicles, the A/C evaporator temperature circuit issues will need to be detected by the PCM on three occasions before the P0535 trouble code is triggered.

Need help with a P0535 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
trouble codes
P0535

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0535 code.

SCHEDULE P0535 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6,328)

Rating Summary
5,857
225
52
35
159
5,857
225
52
35
159

Gustavo

17 years of experience
296 reviews
Gustavo
17 years of experience
Toyota Corolla - Check Engine Light is on - New Braunfels, Texas
As always, punctual and professional. He explains the problem thoroughly. I feel confident in his work and knowledge.

Greg

22 years of experience
86 reviews
Greg
22 years of experience
Mazda 3 - Check Engine Light is on - Queen Creek, Arizona
Greg was scheduled for 1:00 but he was able to come earlier and let us know right away. He was very thorough and spent his time going thru the entire car.

Gustavo

17 years of experience
296 reviews
Gustavo
17 years of experience
Lincoln Aviator - Check Engine Light is on - San Antonio, Texas
Made call before appt. -courteous-knowledgeable-got part need & did prompt repair after computer check.

Claud

8 years of experience
325 reviews
Claud
8 years of experience
Chevrolet Trax - Check Engine Light is on - Grosse Pointe, Michigan
Very good experience. He arrived on time. Explained what he was going to do. Completed the work and was thorough in what I needed for my next service in plain language vs car jargon. I'm a raving fan of Claud!


More related articles

P2062 OBD-II Trouble Code: Reductant Supply Control Circuit Open
P2062 P2062 code definition Reductant Supply Control Circuit Open What the P2062 code means This code means the Engine Control Module (ECM), or Powertrain Control Module (PCM), doesn’t see electrical current flowing when it commands the pump on. What...
P3492 OBD-II Trouble Code: Cylinder 12 Deactivation/Intake Valve Malfunction
P3492 P3492 code definition P3492 is the fault code for what’s known as Cyl12 Deactivation/Intake Valve Ctrl Circ High. Cyl12 specifies that the issue is likely taking place in engine cylinder number 12. In some Dodge vehicles, this code indicates...
P0277 OBD-II Trouble Code: Cylinder 6 Injector Circuit High
P0277 P0277 code definition This code means that there is an injector circuit malfunction affecting cylinder six. What the P0277 code means When this code appears, the ECM (engine control module) has reported that either the resistance of voltage...

Related questions

My Check Engine Light came on. I fixed the issue, but the light quickly came back on. Will it turn itself off?

Just because a code is displayed does not mean that part is bad in all cases. The code is used as a tool to diagnose the problem. You may have to have the code diagnosed by an experienced mechanic like...

"Check gauges" light is on.

In most cases, one of the gauges on the dashboard may be reaching a high, low or inaccurate value to trigger the check gauges light. The idle control valve is not located near the belt but may cause starting or...

My car has a fuel injector problem, how can I free myself from this problem?

Hi there: In most cases, the symptoms you're describing are related to fuel delivery problems; with components such as the Mass Airflow Sensor, TPS (Throttle Position Sensor), or the throttle body itself being damaged, having faulty connections or simply being...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com