Recently bought a 2016 juke sv. Had a service engine light on when we bought it so Nissan said that it was a temperature sensor on engine and we knew that when we bought the car. After that was fixed the light came back on the same day. Nissan dealership said it was a code for the catalytic converter but he didn't think there was actually anything wrong and it seemed to be an old code? Then later that same day the light came back on. At Nissan the next day they said it was a different code, for the O2 sensor. My dad was talking to then since I work full time and don't know too much about cars but I guess Nissan still didn't think it was an issue so they sent us on our way. That was yesterday morning. Today this afternoon im driving it and the light comes back on. I'm freaking out since I don't have so much money to pour into what was supposed to be a good car and I've never seen anyone online have these issues. The guy at Nissan mentioned something about how if the previous owners used regular fuel and I put premium in (it's only 1/4 through its first premium tank) then maybe that could be messing with the cars workings. Could it be the case that changing the fuel has caused these codes to go off in error? Or am I totally fucked and have to keep throwing money at this car that I just spent over 10k on 😭
Aziza27313
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Those two codes are directly related to the downstream O2 sensor. On a FWD Juke it is accessible underneath the car on the exhaust pipe near the “bend” in the pipe. On a AWD Juke it’s not as accessible but still underneath the car, just higher up on the exhaust. P0037 is a code for the heater circuit of the sensor. The sensor has to be warmed up to operate and read properly (either artificially through the ECU and battery, or from the exhaust). P0138 is telling us the sensor reading is too high or shorted to battery positive voltage. My guess is you will see the P0138 again when you get the code read. Also my guess is the downstream O2 sensor has gone bad. There is a chance a wire got pinched or shorted which is causing the sensor to read wrong and causing the heater circuit to fail. If there is a wire harness problem, it probably happened when the CVT was replaced.
as stated previously, a good third party mechanic will know how to troubleshoot and repair error codes. Asking the internet will get you any number of answers both good and bad.
as stated previously, a good third party mechanic will know how to troubleshoot and repair error codes. Asking the internet will get you any number of answers both good and bad.
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You can try asking the shop that did the transmission replacement to cover the O2 sensor, but they might not do it. You’d have to ask where you bought the car if the O2 sensor is covered under power train warranty you got from them. I don’t know where the temperature sensor is so I don’t know if that’s related to the replacement. But I can tell you they had to pull the engine out to replace the CVT, so yes it’s possible any number of sensors or wires may be affected. It’s rare, but mistakes happen. On the other hand, it’s entirely possible this sensor just failed and pulling out the engine had no affect on it failing. The O2 sensor is roughly $200 USD. Yes it’s not cheap (and I wouldn’t try and get a generic sensor from any auto parts store), but unless a mechanic does a thorough check of the circuitry and wiring, it’s a start to finding the issue. Maybe a new sensor will fix it, but the only way to find out is either replace it or do further investigation in the wiring.
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Not to mention P0037 and P0138 directly reference bank 1 sensor 2 and HO2S2 which is also known as the downstream O2 sensor.
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