Error Code P0538 is certainly described as A/M Evaporator Heat Sensor Circuit Large. This means an abnormal voltage reading from the A new/C evaporator temperature sensor has been detected, which could become triggered by a fauIty temperature sensor ór wiring issues.
Description
This code can be a universal trouble program code, indicating it implements to all vehicles equipped with the OBD-II program, especially vehicles made since 1996 up to existing. This contains but not really restricted to Chevrolet, Dodge, Ford, Memory, etc. Though generic, specific methods may differ depending on the help make, model, calendar year, and powertrain configuration of the vehicle.
Essentially, the A new/C evaporator works in the opposing feeling as the condenser. The former converts fuel to fluid, while the previous converts liquid to gasoline while absorbing warmth from the fan atmosphere which moves through it in the process.
Kia Optima: Replacement. Disconnect the negative (-) battery terminal. Loosen the mounting screw and then remove the crash pad lower cover (A). Remove the evaporator temperature sensor (A), by pulling it after rotating 90° in a counterclockwise direction. Installation is the reverse order of removal.
The objective of which can be to remove the high temperature from the air flow inside the vacation cabin and decrease the temperature inside the automobile. The A/G evaporator temperature sensor performs an important role in the proper procedure of the HVAC (Heating Air flow and Air Fitness) system. The PCM (powertrain control module, also identified as ECM or motor control component in various other vehicle makes) utilizes electrical values from this sensor to alter the temperature according to your needs, alongside with thé evaporator among thé A/C parts.
Mistake Code G0538 can be established when the PCM picks up an unpredicted high electric condition in the A/C evaporator témperature sensor ór its circuit(t).
Additional related error codes include:
- Error Code P0535
- Mistake Code P0536
- Error Code G0537
- Error Code G0539
Common Signs and symptoms
As with additional error codes, this program code activates the Check out Engine light and signs up the code to the vehicle's memory system. Additional noticeable symptoms consist of:
- No frosty air coming from the ports
- A/Chemical compressor clutch not joining
- Malfunctioning HVAC program
Possible Causes
The most common lead to of this program code is faulty evaporator temperature sensor. Various other potential leads to include:
- Defective enlargement valve (qualified prospects to freezing up of evaporator primary)
- Open up, brief, corroded or damaged electrical components
- Wiring harness connector problem
- Overcharged A/G program
- Insufficient refrigerant levels
- Defective weather control head
- Substitute of the A/C evaporator témperature sensor
- Alternative of the extensive valve
- Replacement of A/Chemical compressor switch
- Substitute of the environment control mind unit
- Incorporating refrigerant
Hów to Check out
As with most error requirements, make sure you verify with the TSB (complex service bulletins) to obtain accessibility to known fix for common repairs. This will save you period and money for diagnosis and maintenance.
Phase 1
Find the A/C evaporator témperature sensor and inspect it completely. Usually, this is situated inside the HVAC surroundings package. The sensor is mounted to the évaporator itself, if not really extremely near it. Generally, you can get access to it by merely looking under the dash. In some instances though, you may require to remove many plastic material sections and radio stations, so it's greatest to refer to your service manual for the specific location. Also, make sure you maintain an eyesight for any signs of overheating or deterioration from the sénsor itself. This nearly always indicates a problem. If you discover it defective, then replace the sénsor.
Suggestion: Make sure you check the temperature of the inside. It should end up being at a fair degree before operating. Prying on frosty plastic could cause it to split conveniently.
Phase 2
Check the temperature sensor. Numerous occasions, these are resistor kind sensor, which indicates the level of resistance within the sensor modifications in direct relationship to the témperature. Understand hów this functions, so you possess a great concept of how to diagnose the sensor itself. In many cases, the manufacturer will have got a desired opposition at particular temps.
Make use of a multimeter to record the opposition within the sensor, and compare it to the preferred values arranged by the manufacturer. If there is an open up problem, that indicates you may possess an inner opposition within the sénsor, which must become changed.
Take note: Automobile manufacturers provide specific methods for analysis depending on which kind of sensor, create, design, etc., therefore again, examine your services manual. If still unsure, after that you'll be much better off wondering the solutions of a reliable shop with accredited refrigeration program specialist.
Action 3
Check the wiring and situated the evaporator témperature sensor. If cán be easy to located and adhere to the control, so check out for any obvious signals of damages too, specifically around the drivers and passenger's ft. Wirings disturbance is common in that area. Repair and replace elements appropriately.
How to Fix
Depending on your medical diagnosis, common fixes for this program code consist of:
The almost all common error in dealing with this program code is assuming it'beds a situation of inadequate refrigerant, which can direct to adding more to the vehicle that nevertheless has sufficiently. This can effect in severe damage. Thus, a thorough diagnosis can be crucial.
A vehicle with this program code is still drivable, but the A/C will not work efficiently, or not really function at all.