4 trouble codes... any linked?

[tomustang]

P1409
P1131
P0135
P0301

i know what they are but i don't know if they are linked to each other. the P0135 is because my o2 wiring is torn off so i know why the light's on. but the others i don't have a clue.

 

[bdcardinal]

P1409 EGR Vacuum Regulator circuit malfunction

P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1.

P0301 Misfire Detected - Cylinders 1-10.

P0135 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 1.

check the vacuum on the EGR, and there is a misfire in #1, could be the spark plug, wire, or fuel injector. i would do a compression test on all cylinders just to be safe.

 

[ragu1585]

when i first got my 98 ,, i was gettin a 1130 and 1131, went to the store put some stp gas treatment in the car and havnt seen the light on in about 4 or 5 months

 

[tomustang]

P1409 EGR Vacuum Regulator circuit malfunction

P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1.

P0301 Misfire Detected - Cylinders 1-10.

P0135 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 1.

check the vacuum on the EGR, and there is a misfire in #1, could be the spark plug, wire, or fuel injector. i would do a compression test on all cylinders just to be safe.

thanks for the info. how do i check the vacuum on the EGR?

 

[tomustang]

i noticed when i was peeking around that there wasn't an EGR gasket in there. would that be alone enough to send off the P1409?