Help System too rich P0172 *check engine light*
05-17-2008, 01:38 PM
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Help System too rich P0172 *check engine light*
soo i just rented a autozone scanner and it say i "system to rich" p0172. i also just replace my old o2 sensor with a new oe denso o2 sensor. my CE light is sill on.
any help?
any help?
05-17-2008, 05:25 PM
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Try unplugging the ecu and plugging it back in again.
I believe disconnecting the battery does the same thing though.
I'm pretty sure p0172 is picked up by the exhaust manifold o2 sensor - but if your engine IS running rich, just replacing the o2 sensor will not do anything. The CEL will still be thrown.
I believe disconnecting the battery does the same thing though.
I'm pretty sure p0172 is picked up by the exhaust manifold o2 sensor - but if your engine IS running rich, just replacing the o2 sensor will not do anything. The CEL will still be thrown.
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