Hey all, first post. Just got a new used 2002 mustang V6 (90k miles) with dealer cleared codes...... 
...... .anyway, last week I got the p1131 (bank 1 lean) which I fixed with a new O2 sensor. I replaced both pre-cat O2's.
Now I'm getting a p0135 bank 1 sensor 1(heater circuit malfunction) - the sensor I replaced. Visually inspecting the sensor wires it looks good. Looped against the firewall. What should I check next? Replug the sensor and use electrical spray? Do I need to check heater circuit power in that sensor while the car is running? If so how the heck can I do that when I could barely twist half a finger in to install the thing?
Any help is GREATLY appreciated. Coming from a Saturn the mustang is a completely different and really fun ride, hoping to fix it now....
...... .anyway, last week I got the p1131 (bank 1 lean) which I fixed with a new O2 sensor. I replaced both pre-cat O2's. Now I'm getting a p0135 bank 1 sensor 1(heater circuit malfunction) - the sensor I replaced. Visually inspecting the sensor wires it looks good. Looped against the firewall. What should I check next? Replug the sensor and use electrical spray? Do I need to check heater circuit power in that sensor while the car is running? If so how the heck can I do that when I could barely twist half a finger in to install the thing?
Any help is GREATLY appreciated. Coming from a Saturn the mustang is a completely different and really fun ride, hoping to fix it now....
