05 hyundia elantra 02 heater circuit failer

Supposedly blinking ac indicates ambient air sensor needs replaced ?????? no it doesn't ! Why don't you do yourself a favor an take it to a qualified repair shop that knows how to diagnose it correctly . Hooking up a factory or professional scan tool an checking for code's is the first thing to do. The way to know if a sensor has a malfunction is by A stored DTC - diagnostic trouble code .
DTC Descriptors
DTC B0158 02: Outside Air Temperature Sensor Circuit Short to Ground
DTC B0158 05: Outside Air Temperature Sensor Circuit Short to Battery or Open
DTC B0163 02: Passenger Compartment Temp Sensor 1 Circuit Short to Ground
DTC B0163 05: Passenger Compartment Temp Sensor 1 Circuit Short to Battery or Open
DTC B0168 02: Passenger Compartment Temp Sensor 2 Circuit Short to Ground
DTC B0168 05: Passenger Compartment Temp Sensor 2 Circuit Short to Battery or Open
DTC B0173 02: Output Air Temperature Sensor 1 Circuit Short to Ground
DTC B0173 05: Output Air Temperature Sensor 1 Circuit Short to Battery or Open
DTC B0178 02: Output Air Temperature Sensor 2 Circuit Short to Ground
DTC B0178 05: Output Air Temperature Sensor 2 Circuit Short to Battery or Open
DTC B0509 02: Output Air Temperature Sensor 3 Circuit Short to Ground
DTC B0509 05: Output Air Temperature Sensor 3 Circuit Short to Battery or Open
DTC B0514 02: Output Air Temperature Sensor 4 Circuit Short to Ground
DTC B0514 05: Output Air Temperature Sensor 4 Circuit Short to Battery or Open
DTC B3578 02: Output Air Temperature Sensor 6 Circuit Short to Ground
DTC B3578 05: Output Air Temperature Sensor 6 Circuit Short to Battery or Open
DTC B3583 02: Output Air Temperature Sensor 7 Circuit Short to Ground
DTC B3583 05: Output Air Temperature Sensor 7 Circuit Short to Battery or Open

Have it checked for DTC'S -diagnostic trouble codes . That will tell you what's up . Dealer or someother qualified repair shop .
DTC P0532: Air Conditioning A/C Refrigerant Pressure Sensor Circuit Low Voltage
DTC P0533: Air Conditioning A/C Refrigerant Pressure Sensor Circuit High Voltage
DTC P0645: A/C Clutch Relay Control Circuit
Circuit System Description
When the A/C switch is pressed, the HVAC control module sends a serial data message to the ECM. This input will request the engine control module (ECM) to ground the A/C compressor clutch relay control circuit, which will switch the A/C CMPRSR CLUTCH relay on. With the relay contacts closed, battery voltage is supplied to the A/C compressor clutch assembly.

DTC B0228 02 : Recirculate Position Feedback Circuit Short to Ground
DTC B0228 05 : Recirculate Position Feedback Circuit Short to Battery or Open
DTC B0228 61 : Recirculate Position Circuit Actuator Stuck
DTC B0413 02 : Temperature Control 1 Feedback Circuit Short to Ground
DTC B0413 05 : Temperature Control 1 Feedback Circuit Short to Battery or Open
DTC B0413 61 : Temperature Control 1 Feedback Circuit Actuator Stuck Open
DTC B0423 02 : Temperature Control 2 Feedback Circuit Short to Ground
DTC B0423 05 : Temperature Control 2 Feedback Circuit Short to Battery or Open
DTC B0423 61 : Temperature Control 2 Circuit Actuator Stuck

code p 0058 refers to heated oxygen sensor (HO2S) 2 bank 2-heater control--circuit high === causes --wiring short to positive ---HO2S--ECM
for your previous post code p 0038 refers ti the HO2S 2 bank 1 heater control circuit high ===the causes are the same

Ho2s heater control circuit low (bank 2, sensor 3) the circuit that heats the 02 sensors is not work correct

That is because the check light indicated on OBD2
System Fault

You replaced a part based on the code

The codes are used to diagnose the system that set
the code & then component test

You apparently didn't diagnose the real cause of the
possible problem

The sensor may have been just doing it's job

When you come here either give use the codes or
just Google them to learn the ins & outs

get the cooling system flushed, that also clears out the heater core.

theres more then one o2 sensor the code its throwing tells you which ones bad the code you have is for bank one

The possible causes you describe are many... Take/tow the vehicle into a Hyundai Service Center (dealership), pay the diagnostic fee. They will tell you EXACTLY what the problem is and what's needed to fix it (parts, labor, tax, time-frame, etc.).

Had the same problem You need to go to dealer and order an O2 sensor with California emissions. The wire will be longer and fit into the prong

hi this sounds like the elec operated coolant control valve has failed? common fault on ford models however to confirm this? if you warm engine to normal then turn temp setting to full hot do not put fan on yet! locate the heater hoses from engine to point they go into bulkhead of engine bay? feel each hose for heat ? if one is warm/hot and other much cooler/cold ? then cooler valve is not opening so coolant can flow thro heater matrix inside car understand?? unfortunate;y this valve is not servicable but is easy to change and not too expensive ? its location is normally at point prior to entering car interior and you will find it if you follow heater hoses? it may well be in bay below the grill below w/screen is normally plastic renewal will be apparent when you see it ? hope this helps ? just one point all above is on assumption you have checked radiator coolant level is topped up ?? if not this will also give no heat thro heater ? if very low