My 2003 Honda Accord with 101,000 miles started hesitating on acceleration, and a day later my check engine light came on. I went to the auto parts store to borrow one of their diagnostic computers. The code I received for the engine light was from my O2 sensor. What can cause the hesitation and …

How do you know it was for your O2 sensor? Was that the interpretation of the sales person at the car parts place? You need to post the actual code here to get valid advice. The code will be a letter and 4 numbers, the code readers used at the car parts houses generally only read the P0xxx codes. …

That CEL (check engine light) is just a kid in class waving her hand trying to get you attention because she has the answer. You need to have the codes read. Some places will read them for FREE. Try Autozone or Advanced Auto Parts. Get the exact code (like P0123) not just their translation into Engl…

The code is P0141 on the print out. The definition written underneath is HO2S12, heated oxygen sensor-bank 1 sensor 2.

That code is for problems relating to the O2 sensor that is in back of the catalytic converter, but the sensor may not actually be the source of the problem. Before you go to the trouble of replacing the sensor, check for an exhaust leak, as that can also trigger that code. Many chain muffle…

Would those problems cause the hesitation when accelerating also?

No…The downstream sensor is simply monitoring the efficiency of the CAT… The “hesitation” you describe is probably misfire of some sort that is not profound enough to set a fault code of it’s own…But the misfire sends too much unburned fuel into the exhaust system for the converter to handle so it …

Yes, this sensor can cause hesitation and can have a big affect on fuel economy, but the code is not for the sensor itself. The sensor is operating within its parameters. The code is for the heating circuit for the sensor. These sensors do not work when cold, they have to be heated up. The exhau…

It is the FRONT oxygen sensor, the one before the converter, that controls fuel trim. It can have a big impact on mileage and engine performance. The rear sensor is there to monitor the performance of the converter and it has no control over engine performance issues…

The car is my wife’s and we just got married in July, so I’m not aware of the maintenance history. She says that she has been taking it to the dealership for all maintenance. Whenever they have told her to do something, she lets them do it. However, I don’t think they kept up with it very well co…

2003 Honda Accord Hesitating and check engine light on

Maintenance/Repairs

knfenimore October 7, 2012, 9:41pm 6

This link may help.
http://troubleshootmyvehicle.com/ford_o2_sensor_heater/sensor_heater_code_2.php

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2003 Honda Accord Hesitating and check engine light on

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