I have a code 36. Diagnosed the circuit all wiring and relays checkout ok. The diagnostics for the code are very poor. What are the conditions for the code to set, How do you know that the burnoff has taken place. When the code is cleared, vehicle is warmed to closed loop and shut off. Once vehicle is cranked back up the second time, the SES light is on again with a code 36. The code chart makes a point to say not to suspect a faulty MAF. Can anyone help me??????