p0171 and p2a00
#1
p0171 and p2a00
Just stopped at O'Reilly and scanned my 2003 Honda Accord 2.4 Vtec. came back with the problem codes listed in the title.
P0171 - System too lean bank 1
p2a00 - oxygen sensor 1 bank 1
I would like to do the easy one first. Is the problem code 0171 trigerred by a bad 02 sensor. Would it make more sense to change the o2 sensor first , and if issue still around to go for the fuel pressure regulator which most of the issues point to when it comes to 0171 code.
Please help.... I love my accord but poor gas mileage and bad performance caused by these two codes are pissing me off.
P0171 - System too lean bank 1
p2a00 - oxygen sensor 1 bank 1
I would like to do the easy one first. Is the problem code 0171 trigerred by a bad 02 sensor. Would it make more sense to change the o2 sensor first , and if issue still around to go for the fuel pressure regulator which most of the issues point to when it comes to 0171 code.
Please help.... I love my accord but poor gas mileage and bad performance caused by these two codes are pissing me off.
#2
Hi Member
PO171 code is more than likely caused by #1 A defective oxygen sensor
#2 an ignition misfire or vacume leak-repair, # 3 Fuel injector problem.
With 2 codes like you have , I would expect fuel pressure and the MAF sensor also.
Take off the MAF and have O'reilys or an Auto Zone check it for you.
WheelBrokerAng
#2 an ignition misfire or vacume leak-repair, # 3 Fuel injector problem.
With 2 codes like you have , I would expect fuel pressure and the MAF sensor also.
Take off the MAF and have O'reilys or an Auto Zone check it for you.
WheelBrokerAng
#4
Change the front O2 sensor first, there's a good chance that's the reason for P0171.
Down low, between the engine & firewall. Look where the exhaust system comes down from the engine. It's #16 in this picture.
And... unless it's a California car, it probably doesn't have an MAF sensor.
Down low, between the engine & firewall. Look where the exhaust system comes down from the engine. It's #16 in this picture.
And... unless it's a California car, it probably doesn't have an MAF sensor.
Last edited by JimBlake; 07-16-2010 at 07:35 AM.
#5
I'm having the same issue. Well, actually replaced the upstream o2 sensor, then got a code for the downstream one. Replaced that, erased codes, then 24 hours later got the codes above.
P0171 - System too lean bank 1
p2a00 - oxygen sensor 1 bank 1
Advance told me that perhaps I hadn't driven it enough after the codes were reset, so I erased them again and took to the road. Everything's running fine. 24 hours later P2A00 again. What next? I saw above that the MAF Sensor came up, but it's likely only on California cars. I have a Canadian 04 Civic EX.
Thoughts?
P0171 - System too lean bank 1
p2a00 - oxygen sensor 1 bank 1
Advance told me that perhaps I hadn't driven it enough after the codes were reset, so I erased them again and took to the road. Everything's running fine. 24 hours later P2A00 again. What next? I saw above that the MAF Sensor came up, but it's likely only on California cars. I have a Canadian 04 Civic EX.
Thoughts?
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