how do i check why its on

 

Go to DIY forum and read procedure to extract your codes (DTC's).

Summary:
Locate service check connector under glove box (blue 2 wire connector may be plugged into a plastic holder). Jumper wire to short two pins, turn keyswitch to On, and Check Engine Light (CEL) will flash codes; long flash =10 and short flash =1, long pause between successive codes, followed by repeat of sequence.

Post your codes for additional help.

good luck

 

its my o2 sensor code 41 thanks for the help

 

Code 41 is a afault in the O2 sensor heater circuit. It can be faulty sensor heater element, faulty connector (dirt/oil), damaged wiring, and possibly a faulty ECM.

Suggest disconnecting O2 sensor and checking resistance of O2 sensor heater wires (two same color wires on sensor side of connector). Resistance should be 10-40 ohms. If dead short (zero resistance) or open circuit resistance, the O2 sensor is fault and should be replaced.

If resistance checks OK, further diagnostics are indicated to find the fault (probably an open) location, and possibly a faulty ECM. ECM's are beginning to show up more frequenty in this vintage Accords.

good luck

 

will it affects the performance

 

O2 sensor heater allows sensor to begin working quickly during cold warmups. It may not affect operation once fully warmed. However, the Check Engine Light will remain on until repaired.

good luck