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#1
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O2 Sensor Problem
My 94 SVX check engine light came on, and it was showing codes 32 (right hand side O2 sensor) and 37 (left had side O2 sensor). So I replaced both sensors with the ones by NTK. But I'm still getting an intermittent CEL code 37. I removed the left hand side sensor, checked all connections and reinstalled, but am still getting a CEL code 37. Any ideas what the problem could be? Not sure that this relates to the issue, but I recently replaced my MAF sensor with a new one for a 97 Legacy. Could I just have a bad O2 sensor right out of the box?
Other than the CEL light the engine runs and sounds fine. Thanks. Larry |
#2
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Re: O2 Sensor Problem
Check your timing. The belt may have jumped one or two teeth.
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1992 Dark Teal LS-L w/ 165k+ miles (traded ) Mods: Power Slot front rotors, polyurethane sway bar bushings, window scratcher fix, SPD hood struts, Outlaw Engineering phenolic spacers, Bontrager Works 22mm rear sway bar, R-134a conversion, 93 Legacy SS 5 speed swap, Ceika coilovers, ARP head studs 2001 Black Toyota Sequoia (hauler/daily) 1992 Blue Toyota Cressida (drift car) 1992 Red Toyota MR2 (weekend/track day car) |
#3
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Re: O2 Sensor Problem
If it's running fine the timing should be ok. Did you reset the computer after replacing the sensors? Let it sit overnight with the battery disconnected.
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"The things you own end up owning you. It's only after you lose everything that you're free to do anything." 92 Pearl White Ls-l (138k) Euro Headlights & Blinkers, 97 Grill, Euro Tail Lights, SS Brake Lines, Stebro Exhaust, Slotted Rotors, Classic Registration 96 Legacy Outback (206k) 5-speed 2.2 Lightweight Crank Pulley, Group N Trans & Motor Mounts SOLD Wanted: Steering Wheel |
#4
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Re: O2 Sensor Problem
The maf is not correct. I know many people use them for short term or diagnosis purposes but until that is corrected it will be very hard to properly diagnose your O2 sensors.
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Current Stable: 1992 SVX 1979 K5 Blazer Cheyenne 1956 Plymouth Belvedere - Daisy 1967 Chevy C20 1953 Chevy 210 1969 Plymouth Satellite 1949 Chevy Thriftmaster 1959 Chevy Apache 1951 Chevy Stepside 1969 Chevy Camper Special 1978 Ford F150 w/ stroked 460 1986 Volvo 740 turbo wagon 1999 GMC 2500 Creep Van 1994 Impreza Outback |
#5
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Re: O2 Sensor Problem
Yes, I reset the engine codes. I installed the new O2 sensor today and the CEL light didn't come on during a 20 mile drive, but i need to put some more miles on it to be sure. Regarding the MAF sensor, I resoldered the old one and will reinstall it if the CEL light comes back on in the next few days.
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