Skip the auto shop - Our mechanics make house calls

Q: How do I fix O2 sensor heater cylinders 1-6 circuit malfunction?

asked by on

Check engine light on. OBD trouble code P1193. Cause: wiring. Where are the O2 sensor heater cylinders located and how do I fix this problem? Will the check engine light go out if I resolve this correctly?

My car has 150900 miles.
My car has an automatic transmission.

The oxygen sensor heater is integral to the sensor assembly itself. It is not separately serviceable. If the heater tests bad, the entire sensor is replaced as an assembly. In your case, P1193 refers to an oxygen sensor which is mounted after the catalytic converter and whose purpose is solely to monitor the efficiency or effectiveness of the converter. The sensor is not used to optimize the operation of the engine itself. Sensor heaters can be tested using an ohmmeter prior to condemning the sensor just to be sure there is not an external wiring fault. If the heater and/or sensor is bad you should replace the sensor because otherwise the check engine light will always be on, thus making it impossible for you to be alerted to the existence of any new or additional trouble codes, if such arise while the light remains lit for the P1193 Code. If you desire that the sensor heater be tested, and the oxygen sensor be replaced, if necessary, please request an oxygen sensor diagnostic/replacement and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: auto transmission leak,when cold would take long time to shift down and then fine, suddenly leak from around bottom bell housing

The transmission cooler lines go into the radiator to keep the transmission fluid cooled. It may be possible that the engine radiator leak has caused the transmission to get hot and now the transmission front pump seal or front shaft...

Q: My car is overheating even after replacing waterpump and thermostat

Hi. It sounds like the heater core is clogged and restricting the flow of coolant in the coolant system. There is also the possibility that the new radiator is defective and is causing the car to overheat. The head gasket...

Q: Check Engine Light with P0174 code

As you know, this code relates to a lean fuel condition which can be caused by many different things, some of which you have already addressed. The oxygen sensors, which are part of your emissions system, read exhaust gases to...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.