P0141 , P1157 ---2004 Honda Accord Lx 2.4L
 

I have 46K miles on my car, it runs pretty well but Check Engine light was on and I took it to a local mechanic and He did scanning and detected CODE P0141 and changed the BOSH Oxygen Sensor (Bank 1) and the spark plugs. Disconnected battery and CEL was off.

10 mins later , I found that CEL was on again and this time the Code was P1157.

I am attaching the picture of the Sensor my mechanic has changed, please help me understanding as whts going wrong with the car and what is the impact on the car If while CEL on.

Thanks

P0141 was the preheater, built into the O2 sensor. So maybe the heater was burned out.

P1157 is a problem with the actual SIGNAL from that sensor. Possible that he used a 'generic' kind of sensor? I think '04 wants a wide-band sensor for A/F metering, not the same as the simpler sensor that have been used in Hondas for years before.