I've read hundreds of posts on this forum regarding HEGO sensor failure codes (P1131 for instance). Almost without fail, the first thing suggested to try is replace the sensor. Well people, let me give you a little piece of common sense troubleshooting strategy. All 4 HEGO sensors on the SVT Contour are identical. If you suspect a particular sensor might be bad, just swap it with the sensor on the other bank (V6 engine, remember!), reset/clear the EEC codes, and see if the problem moves to the opposite bank sensor the next time the CEL light comes on. If it does, the sensor is bad and then you can replace it. If it stays on the same bank, the sensor is NOT the problem and you can move on to the next step and look elsewhere. FWIW, most HEGO sensors will work at least 100K miles with no problems.
I just hope this saves a LOT of you posters a LOT of green.
Regards,
Midnightengineer
1999 SVT Contour
1990 SHO
1967 Ferrari Dino 206
1967 Fiat Dino Coupe' 206 (3)
