new poster with a problem

[bob528]

Hello! I am the owner of a 97 Camry that now has 171,ooo miles on it. I have loved this car since I bought it.Never had a major problem,a fuel pump, a timing belt change, normal things.Ihave never had a check engine light come on until now.the code reads P O 172, too rich bank 1. It is a four cylinder, so what bank 1 means is beyond me. Any ideas? Thanks in advance.

[toyomoho]

The code means the computer is running the engine rich to compensate for an engine system problem.

The 4 cylinder has only 1 bank (Bank 1). The V6 has 2 banks, Bank 1 closest to the firewall and Bank 2 closest to the radiator.

Any other codes. Any reference to something like Bank 1, Sensor 1, etc.

Issues that can cause the are:

Exhaust system leak
Fuel pressure issues
Injector leakage
02 sensor, Bank 1 Sensor 1
MAP sensor
Coolant sensor

Typically it is the 02 sensor. This would be the first sensor in the exhaust system going from the cylinder head.

[bob528]

No other codes,just bank 1. I did have the injectors cleaned and the fuel filter replaced yesterday,but the check engine light came on again. Do I have to go to Toyota to find out what the problem is? Does their analyzer pinpoint the problem?