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6 votes
4 answers
104k views

How do I resolve error code P1135 in my Toyota Camry?

I recently replaced the downstream O2 sensor in my Toyota Camry. Shortly thereafter, the check engine like came on again providing the following codes: P1135 which I understand to be the upstream ...
4 votes
1 answer
5k views

O2 Sensor Error after replacing spark plugs?

Ford Taurus 2004 Sedan SES DOHC. (The car is actually in the shop right now and I told him to hold off until I get more info.) Took the car to the local shop to get the spark plugs replaced. Because ...
2 votes
0 answers
675 views

2001 Camry P1135 Cause

Sorry in advance for the long post. My check engine light in my 2001 Camry 4cyl recently came on with code P1135. Google shows that this is usually a faulty sensor. However, I noticed on some posts ...
1 vote
0 answers
100 views

Check engine light won't stay off

I've attempted to get my check engine light fixed a couple times and at each repair facility they've scanned the code and told me it was a bad oxygen sensor. I had the oxygen sensor replaced at both ...
1 vote
0 answers
58 views

Need help fast with my truck please

My 1994 dodge Dakota v8 starts fine and ildes fine. If I drive for about 10m my engine light comes on and my code for the 02 sensor goes off. My truck is straight piped and has no cat it has a steel ...
12 votes
3 answers
111k views

Check Engine code P0420 Catalyst efficiency below threshold bank 1

After months of normal driving with no problems, my 2003 Honda Civic EX check engine light came on during a long trip. Got it scanned and it's P0420: Catalyst efficiency below threshold bank 1. They ...
2 votes
1 answer
223 views

2000 Honda Accord O2 Heater error

After replacing the O2 sensor due to fault codes 1166 and 1167, I still get 1167-Heater circuit error. I check resistance through O2 sensor heat, about 17 Ohms. Plug has 14 volts feeding heater. I ...
0 votes
1 answer
890 views

2002 Honda CRV Suddenly Throwing Multiple Codes and then a Dead Battery

Last night the CEL came on, and I got the codes read on the way home. P0122: Throttle Position sensor "A" circuit low voltage P0139: Secondary HO2S12 (heated oxygen sensor - bank 1 sensor 2) circuit ...
4 votes
1 answer
1k views

CEL code 43 on 1992 Civic

I'm getting CEL code 43 after doing a lot of work on my car (changing the head gasket, which involved removing and reattaching lots of exhaust and intake components, and replacing the fuel filter and ...
0 votes
2 answers
824 views

Check engine light on for O2 sensor (Oxygen) but O2 sensor has been replaced

Someone told me it could be a minor leak somewhere but the check engine light does indicate the above on Mazda 626,year 2000. Could the code be misleading?