Mechanics

TOYOTA OTHER FUEL PRESSURE PROBLEM

2008 Toyota Other • 30,000 miles

Code p0172 fuel too rich blank 1, I have change oxizen censor, plugs still the code is there can pls help. Thx
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Guest
November 10, 2012.



P0172 is a rich running condition and changing the O2 sensor is not going to help. This is a rather complex code that do not indicate what is faulty. Check the air filter for clogging. If there is a return line for fule system ensure it is not clogged and check fuel pressure. It could be too high.

KHLow2008
Nov 14, 2012.
I am facing the same problem with Toyota allion for last 6 month.I change O2, filter plug, engine oil sill. But still same old problem. Please give me the complete solution.

Tiny
Tanjirulbasher
Jan 27, 2013.
There are no direct fix for this problem as it is an operational malfunction and might not be due to a faulty component. You need to start with basic checks.
Check fuel pressure, injectors, air flow.
Try cleaning the MAF and monitor its operating condition.

KHLow2008
Jan 27, 2013.