Car Questions
RepairPal is your advocate for car care advice and guidance

My Ion is misfiring or losing power intermittently.

(2003 Saturn Ion)
in Minneapolis, MN on May 06, 2010
It loses power sometimes at highway speed - the RPMs reduce and and then power returns. It happens more often when trying to accelerate from a stop sign. It is intermittent. I have installed new spark plugs and the only engine code I get is P1133.
Displaying 1 answers & 0 comments
Popular Answer
on May 06, 2010
The P1133 is a slow reacting Oxygen Sensor, which may a result of the misfiring. If the engine is misfiring, are you getting misfire codes like PO300 or P0310 or P0302 etc. because, you should be.
It may feel like a misfire, but is really something else. Try disconnecting your Oxygen Sensor and test driving the car for about 15 minutes. You may be experiencing a lean misfire from a defective Oxygen Sensor,. If the symptom changes or goes away, bingo. If not, take it to a shop for a Pro Diagnostic tech to figure it out.
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I have replaced brakes on my new rav4 2015 in 2016.I am told i have to replace it again 2018 .I complained the ver...
My boyfriend poured a bottle of lotion like hair stuff in my oil and my car is losing power and stalling out and has ...
Didn't find what you were looking for?