2008 Toyota Other Repair Question
Topics covered: Fuel pressure, Air filter, Engine.
Mileage: 30,000 miles.
Mileage: 30,000 miles.
Asked on November 10, 2012
Toyota Other Fuel pressure Problem
Code p0172 fuel too rich blank 1, I have change oxizen censor , plugs still the code is there can pls help.thx
Asked by (pending member)Answer
Replied on November 14, 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.
Replied on January 27, 2013
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.
Replied on January 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.