2003 tls 289,000 miles.
On Friday the engine light came on along with the vsa and triangle. I pulled the codes: P0300, P0302, P0304, P0305, P1399, and P1740. All codes except the last one are misfire codes. The P1740 is a code for: 4th pressure switch failure. The transmission in the car is not the original one. It was replaced at around 90,000 miles. I bought the car from a friend and have the service records showing it was replaced (not an oil jet kit add-on). The transmission fluid is fine, the car has never had any shifting issues. I replaced the switch this morning but haven't cleared the code(s) yet. I drove the car and within a few 100' the lights came on. The engine light will stay on while driving until I press the accelerator (not hard at all, but steady) and then the light starts flashing. Once I let off of the accelerator, the light goes back to constantly on. Once again, if I press the gas it starts flashing again. The engine seems to be rough (shake) under acceleration and above 40 or so mph.
Any suggestions? I purchased a new coil and plan on testing that next. Are the misfire codes and the transmission code a related issue?
On Friday the engine light came on along with the vsa and triangle. I pulled the codes: P0300, P0302, P0304, P0305, P1399, and P1740. All codes except the last one are misfire codes. The P1740 is a code for: 4th pressure switch failure. The transmission in the car is not the original one. It was replaced at around 90,000 miles. I bought the car from a friend and have the service records showing it was replaced (not an oil jet kit add-on). The transmission fluid is fine, the car has never had any shifting issues. I replaced the switch this morning but haven't cleared the code(s) yet. I drove the car and within a few 100' the lights came on. The engine light will stay on while driving until I press the accelerator (not hard at all, but steady) and then the light starts flashing. Once I let off of the accelerator, the light goes back to constantly on. Once again, if I press the gas it starts flashing again. The engine seems to be rough (shake) under acceleration and above 40 or so mph.
Any suggestions? I purchased a new coil and plan on testing that next. Are the misfire codes and the transmission code a related issue?