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P0155

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P0155 OBD-II Trouble Code: 02 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)
P0155 trouble code definition O2 Oxygen Sensor Heater Circuit Malfunction (bank 2 sensor 1)...

Related questions

Question
Getting multiple codes
Hello. When you get these codes together it is typically the result of a vacuum leak. If there is too much air entering the engine, your truck will have idling problems and this will cause issues with the oxygen sensor...
Question
Po155cnf bank 2 sensor heater circuit P1620cnf Also code
The P0155 is the oxygen sensor located on the rear bank of cylinders and before the catalytic converter. Given your mileage, both oxygen sensors (pre-catalytic converter) should be replaced. The pre-cat sensors have the most affect on fuel mixture, saving...
Question
Truck fired up good yesterday & now its won't start up but cranks. 2000 GMC Yukon
Hi - although you have an oxygen sensor heater circuit code (P0155), that would not prevent your truck from starting. Check first for other problem codes as well. Next thing to check is whether you have spark at the plugs...
Question
Periodically vehicle runs rough at idle.
Hi there. Most of the codes that are coming on are for a misfire on cylinder number 3. Check the spark plug and wire on cylinder 3 and see if you are getting a good spark. Then check the fuel...

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