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No it has nothing to do with the cat.
Code 161 is for a problem with the heater circuit for sensor 2 bank two. Either the heater in the sensor has failed, or the circuit that powers the heater is not working.
Hi there: Are you buy same or OE part replacement according with the Hyundai part number catalogue? This is important. Keep in midn that you need reset or delete all previous code stored in the car computer.
DTC P0131 - Oxygen O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1) Essentially the same as P0136 and P0137, a P0131 code refers to the first oxygen sensor on Bank 1. P0131 means the O2 oxygen sensor's voltage remained low for longer than 2 minutes. This, is interpreted by the ECM as a low voltage condition and sets the MIL. Bank 1 Sensor 1 is located in front of the catalytic converter.
There may be no visible symptoms to the driver, other than the MIL (Check Engine / Service Engine Soon) illumination.
A code P0131 may mean that one or more of the following has happened: - Faulty o2 oxygen sensor - Short to voltage on O2 signal circuit - High resistance or open on O2 signal circuit
Possible Solutions: - Replace faulty sensor - Repair short, open, or high resistance on o2 signal circuit
A code P0135 may mean that one or more of the following has happened: - O2 Heater element resistance is high - Internal short or open in the heater element - O2 heater circuit wiring high resistance - open or short to ground in the wiring harness
Possible Solutions Repair short or open or high resistance in wiring harness or harness connectors Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.
PO 134 = 02 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR1)
PO 153 =02 SENSOR CIRCUIT SLOW RESPONSE (BANK 2 SENSOR 1)
PO 154 =02 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 2 SENSOR 1)
PO 155= 02 SENSOR HEATER CIRCUIT MALFUNCTION (BANK 2 SENSOR 1)
PO 171= SYSTEM TOO LEAN (BANK 1)
PO 174= SYSTEM TOO LEAN (BANK 2)
I WOULD SAY YOU HAVE FAULTY OXYGEN SENSORS CAUSING THE ENGINE TO RUN TOO LEAN REPLACE THEM AND YOU SHOULD BE BACK IN BUISNESS
P0141=O2 Sensor Heater Circuit Bank 1 Sensor 2 P0161=O2 Sensor Heater Circuit Bank 2 Sensor 2, the 141 code is a problem with the heated O2 sensor on the drivers side exhaust after the converter, the 161 code is the same except it is on that passenger side exhaust after the converter.