2003 acura tl. recently purchased with 160k miles. A/T
P1259 vtec system malfunction. P0420 catalyst system efficiency below threshold bank 1.
31- 2 engine retard command (pfinh) signal failure.
61- 2 gear position signal failure.
Only on downhill and level roads when i have my foot off the brake/gas pedal and when car is coasting under 20mph it slows down on its own a lil rough then goes back to normal. Like when im coasting up to a stop sign it will slow down (15mph range) rough make a faint brrrr sound then release to normal . And if I try to accelerate at the moment it's slowing down it accelerates really fast. Braking helps because problem only exists in around 15mph- 5mph (approx)..but after i come to a full stop and press gas the car accelerates perfectly...i noticed at moment when the car is experiencing that rough slow down if i put it in nuetral the roughness goes away... im not a mechanic never had opportunity to learn but i am a technical very accurate person. I know i am capable of doing the work myself. Just dont have too much experience on cars. .. im a master carpenter by trade..i restore homes not cars ...i would love to take care/baby and restore this car as much as possible. Just dont know where to start...any tips..advice? Might it be the codes that i have making the car slow down rough? If i clear these codes will this problem still exist?
This problem happened after i changed the oil n filter i used 10-30 high mileage synthetic(autozone rep recommended that one) then after 2 weeks i took car to oil change place and they said u need thicker oil and they put 10-40 high mileage synthetic. Now the problem exists but it comes n goes...i always warm car up for 15 minutes .. the guy at oil change said its probably a sensor problem he also brought to my attention i need to replace my motor mount..might it be the spark plugs or oxygen sensor or solenoid or rocker arm..oil pressure switch? Diagnosing a car feels like detective work and honestly i dont know where to start.....Any words of wisdom or guidance will be greatly appreciated ! Will ship bottle of wine! to whoever can help me figure out this problem.
P1259 vtec system malfunction. P0420 catalyst system efficiency below threshold bank 1.
31- 2 engine retard command (pfinh) signal failure.
61- 2 gear position signal failure.
Only on downhill and level roads when i have my foot off the brake/gas pedal and when car is coasting under 20mph it slows down on its own a lil rough then goes back to normal. Like when im coasting up to a stop sign it will slow down (15mph range) rough make a faint brrrr sound then release to normal . And if I try to accelerate at the moment it's slowing down it accelerates really fast. Braking helps because problem only exists in around 15mph- 5mph (approx)..but after i come to a full stop and press gas the car accelerates perfectly...i noticed at moment when the car is experiencing that rough slow down if i put it in nuetral the roughness goes away... im not a mechanic never had opportunity to learn but i am a technical very accurate person. I know i am capable of doing the work myself. Just dont have too much experience on cars. .. im a master carpenter by trade..i restore homes not cars ...i would love to take care/baby and restore this car as much as possible. Just dont know where to start...any tips..advice? Might it be the codes that i have making the car slow down rough? If i clear these codes will this problem still exist?
This problem happened after i changed the oil n filter i used 10-30 high mileage synthetic(autozone rep recommended that one) then after 2 weeks i took car to oil change place and they said u need thicker oil and they put 10-40 high mileage synthetic. Now the problem exists but it comes n goes...i always warm car up for 15 minutes .. the guy at oil change said its probably a sensor problem he also brought to my attention i need to replace my motor mount..might it be the spark plugs or oxygen sensor or solenoid or rocker arm..oil pressure switch? Diagnosing a car feels like detective work and honestly i dont know where to start.....Any words of wisdom or guidance will be greatly appreciated ! Will ship bottle of wine! to whoever can help me figure out this problem.