97 taurus dtc codes

i just bought this 97 taurus gl with a 3.0l ohv i have dtc po402, p1131, p1132 im just wondering where i should start on these.... car misses sometimes at start up, bucks once in a while around 50....i have not found any vacuum leaks... help

thanks splick

p0402- too much egr flow

p1131-lack of bank 1 02 transitions-lean

p1132-lack of bank 1 02 transitions-rich

Sounds like your Differential Pressure Feedback EGR (DPFE), aka EGR sensor, is faulty.

-Rod

thanks shorod, i was thinking that but wanted someone elses opinion as well before i replaced the part.... thanks all keep you updated.

ok i replaced the dpfe sensor and also the egr sileniod.... cleared codes.... got a p1131 again but none of the other codes.

any ideas?

I'd suggest you check for vacuum leaks that would impact bank 1. Does the engine idle and run fine?

-Rod

it misses of and on and idles up and some sometimes then it runs ok. bank1 would be???? and does not seem to be a vaccum hose leaking on there.... where else to look?

it misses of and on and idles up and some sometimes then it runs ok. bank1 would be???? and does not seem to be a vaccum hose leaking on there.... where else to look?


Bank 1 is always the side that has number 1 clyinder on it, which on a ford is the left side when facing the front of engine. Closest to the firewall. Have you changed any plug wires?? Is it wet or raining when misses at start up? Have you tried the car cleaner trick to find a leaking vacuum line? Cleasn the MAF sensor also.

I have not had a chance to cleanse the sensors yet. throttle body is dirty so i am assumming the idle air control motor is dirty and the mass air flow sensor also. i planned on doing that also... o2 sensor look like originals.... car has 195,000 miles on it... i mainly was wondering what would just effect bank 1 vaccum?

thanks

It wouldn't effect just bank 1. However, if you have a slow O2 sensor on Bank 1 and the sensor on Bank 2 is not quite as slow, that might explain the codes. Or you may have other issues besides a dirty air path.

-Rod

ok looked and and all of those sensors were dirty so i cleaned them anyways... still have the same check engine light so im going to put plugs wires and pcv and spark plugs and fuel filter in it come pay day and see if that might fix it... then well see where to go from there

ok looked and and all of those sensors were dirty so i cleaned them anyways... still have the same check engine light so im going to put plugs wires and pcv and spark plugs and fuel filter in it come pay day and see if that might fix it... then well see where to go from there


Did you clear the codes after cleaning sensors then running it until or if the check engine light came back on??? If not do so and see what happens, otherwise it will take a number of drive cycles if everything is ok to turn off cel.

yea i had them cleared by autozone