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Re: getting a code #P0038
Bank #1 sensor 2 down stream that's after exhaust manifold! I would change both to assure fuel efficiency and economy and they are part of 80thousand to a 100 thousand km service that should be replaced if you replace just the 1 that is gone I guarantee the up stream bank 1 sensor 1 will go almost immediately shortly after save and do it right first time but it is your call these switches work together!!!!I would hope this helps you will need a 22mm wrench to get it off from passenger side under seat area under the car the wire is about3 feet long best to go OEM don't go universal to save 10 bucks you have to cut and join wires not a good seen they will short out eventually so go OEM plugs in perfect thats the way to go the wire snaps in to seat of inside of alternator have fun don't forget to disconnect battery to reset computer while installing!John/Toronto Canada
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Code 038 means the computer is getting a high voltage return in the heater circuit from the O2 sensor mounted after the catalytic converter. The O2 sensors have an internal heater to make them work as soon as you start the engine.
You would need to test the circuit to and from the sensor to find the real problem.
code p0032refers to heated oxygen sensor(HO2S) 1 bank 1-heater control--circuit high===causes --wiring short to positive--HO2S sensor--ECM
code p0038 refers to heated oxygen sensor(HO2S) 2 bank1 heater control --circuit high===causes --wiring shorted to positive --HO2S---ECM
It is most important that when installing /removing the sensor that the correct tool is used to prevent damage to the wiring for the sensors. Severely twisting the wires during installation/ removal will result in the causes for failure listed.
upstream and downstream oxygen sensor heater voltages are too high, possible causes are - bad o2 sensors - shorted o2 wiring - bad pcm clear codes and determine if codes are hard(current) if they are, unplug sensors, clear codes and re-scan to see if p0032 and p0038 appear.(there will be 2 to 4 other codes generated)if p0032 and p0038 are gone from the list, change both o2 sensors. if p0032 and p0038 are still in the list, it is either wiring or pcm issue, use a meter to check for short from o2 connector to ground, with pcm unplugged.. Good luck, Rob
The Heated Oxygen Sensor (1 or 2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)
Symptoms: There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.
Causes: A code P0138 may mean that one or more of the following has happened: * Faulty O2 sensor * Short to battery voltage in O2 sensor signal circuit * High fuel pressure (not as likely)
Here are some potential solutions: * Replace O2 sensor * Repair short to battery voltage in o2 sensor signal circuit