blk93si

99 civic hb dx, 5spd,

i am getting a code 91

91 Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 n/a n/a n/a 98 97-98

P0451
91
Fuel Tank Pressure Sensor Range/Performance

P0452
91
Fuel Tank Pressure Sensor Circuit Low Input

P0453
91
Fuel Tank Pressure Sensor Circuit High Input




i don't get it , comes and stays , only goes away sometimes when i reset the ecu

what is this problem ?


ps. i used to have a holley fuel pump, put in a integra one

if that makes a differnce ?

Jugglez

check and see if your gas cap is broken/damaged.. a new one could solve the problem. a couple members had this problem, and swapping the gas cap corrected it.

bbarbulo

iTrader: (2)

also, the tank has some sort of evaporation control system... the charcoal canister or something, right? anyways, I'm sure there are check valves in there that control pressure. I'd start with a new gas cap, and if it continues, try to troubleshoot the evap system as per Helms instructions.

blk93si

friggen thing, i got a new gas cap , still happens, i think it happens over nite, when i first start the car in the morning

i will check the evap and lines

thanx for all the info

keep it coming