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#1
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Powertrain Control Module
My engine occasionally throws a CEL during normal driving, it goes away in about a minute or two. I bought the car knowing about this from the owner, who took it to a Subaru dealership, they claimed this code was resulting from a faulty PCM. Has anyone had to replace theirs? Where is it's location in the car?
thanks!
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1992 Pearl White/Black Onyx Subaru Alcyone SVX LS-L Donating Forum Member In Good Standing JDM 4.11 Geared Transmission JDM 'ALCYONE' Rear Panel JDM 'BOXER' Eingngine Cover JDM 'SVX' Hood Badge L-Edition Suede Rear Seats |
#2
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#3
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28 Knock Sensor No. 2 (SVX, Left Side)
32 Oxygen Sensor or Circuit (No. 1, Right Side, On SVX)
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1992 Pearl White/Black Onyx Subaru Alcyone SVX LS-L Donating Forum Member In Good Standing JDM 4.11 Geared Transmission JDM 'ALCYONE' Rear Panel JDM 'BOXER' Eingngine Cover JDM 'SVX' Hood Badge L-Edition Suede Rear Seats |
#4
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#5
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I think there are many of us that get the occasional O2 Sensor... if you let up on the gas while climbing a hill?? I'd check out the knock sensor and correct that problem, if you're still having issues with the O2 sensor causing a fault, then work on diagnosing that problem.
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Dave - 03 Baja - 92 SVX - 86 Brat - 08 OB 3.0 |
#6
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I have reciepts from the previous owner,
removal and replacement of 02 sensor (7797021) on 5/7/03 removal and replacement of 02 sensor (22690AA180) on 7/12/05, along with mention of a bad ground wire to the PCM, which was also repaired No info on knock sensor
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1992 Pearl White/Black Onyx Subaru Alcyone SVX LS-L Donating Forum Member In Good Standing JDM 4.11 Geared Transmission JDM 'ALCYONE' Rear Panel JDM 'BOXER' Eingngine Cover JDM 'SVX' Hood Badge L-Edition Suede Rear Seats |
#7
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How hard is it to replace 02 sensors, is it something I can do myself?
A knock sensor is there to make sure there is no detonation or knocking in the engine, correct? If I always make sure to use 91 octane or higher do I NEED the sensor? can I clear the codes in the meantime and see if they come back?
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1992 Pearl White/Black Onyx Subaru Alcyone SVX LS-L Donating Forum Member In Good Standing JDM 4.11 Geared Transmission JDM 'ALCYONE' Rear Panel JDM 'BOXER' Eingngine Cover JDM 'SVX' Hood Badge L-Edition Suede Rear Seats |
#8
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Okay, I've done my searching of the forums and it seems the O2 sensor and the knock sensor aren't going to be too challenging for me. The previous owner seemed convinced that it was the PCM, I guess I'll find out when I'm done. Should I replace both left and right knock sensors while everything is apart, or just do the one for now?
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1992 Pearl White/Black Onyx Subaru Alcyone SVX LS-L Donating Forum Member In Good Standing JDM 4.11 Geared Transmission JDM 'ALCYONE' Rear Panel JDM 'BOXER' Eingngine Cover JDM 'SVX' Hood Badge L-Edition Suede Rear Seats |
#9
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If your going to lift the intake manifold to do the knock's then you should plan to replace all the vacuum lines under there also.
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Dave - 03 Baja - 92 SVX - 86 Brat - 08 OB 3.0 |
#10
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Most of the how-to's say you can just take out the alternator to access the knock sensors. I don't really have time (daily driver) or money (in college) to replace hoses. 1stsubaru parts lists knock sensors for $50 a pop, but $93 for a single o2 sensor.. damn
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1992 Pearl White/Black Onyx Subaru Alcyone SVX LS-L Donating Forum Member In Good Standing JDM 4.11 Geared Transmission JDM 'ALCYONE' Rear Panel JDM 'BOXER' Eingngine Cover JDM 'SVX' Hood Badge L-Edition Suede Rear Seats |
#11
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Walker $50
Denso $75 Bosch $90 all are listed as OE spec, does it really matter? I just want the CEL codes gone
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1992 Pearl White/Black Onyx Subaru Alcyone SVX LS-L Donating Forum Member In Good Standing JDM 4.11 Geared Transmission JDM 'ALCYONE' Rear Panel JDM 'BOXER' Eingngine Cover JDM 'SVX' Hood Badge L-Edition Suede Rear Seats |
#12
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when it comes to O2 you get what you pay for and there is NO way around that... you can go cheep on a knock sensor and you shouldnt have any problems
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- John ASE certified Master Tech W/ X1 Twin City Fleet repair, St. Paul, MN need work done? Have tools will travel
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