Loss of power

2000 FORD FOCUS
230,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
Avatar
  • MEMBER
  • 1 POST
The car has been overheating due to fan relay failure, water pump failure, crack in radiator. Car started losing power and overheating more quickly after radiator developed crack. my mechanic thought there was a blown head gasket but confirmed that was not an issue. fixed crack, replaced relay and water pump, but still no power. ran code and scan tool came back with P1135 (02 sensor) so cleaned both of those. No other codes.
It idles okay but not great. put it in gear and stepped on throttle pedal. it was really slow to move and ran very rough. kept foot on pedal and there was a bit of a surge and power increased. had to slip into neutral and feather the pedal at each stop to keep it from shutting off. I had to repeat this procedure every time I slowed down or stopped. drove it approximately three miles. on the outward leg. there would be a bit of a surge and car would speed up. on the return trip, the surge did not happen and did not gain power, just kind of put, putted along very slowly.
Jan 13, 2018 at 1:11 AM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Good morning.

First, O2 sensors cannot be cleaned. When they are bad they need to be replaced.

The constant overheating is the issue. You need a second opinion on the head gasket. A leak down test is the proper test to confirm. A shop can perform this test.

Also, the catalytic converter may be clogged from all the overheating causing low power.

Roy
Jan 13, 2018 at 3:35 AM
Avatar
HARRY P
  • CERTIFIED EXPERT
  • 2,292 POSTS
There is no code P1135, according to ALLData. There are some 1130's codes, so I will attach the information in an image below. The closest thing is the 1137 code, which basically says that the downstream O2 sensor is not working (the sensor that is between the catalytic converter and the muffler). I think you need to go get it scanned again so we can make sure that have all of the right codes. AutoZone, Advance Auto, O'reilly Auto, and Pep Boys all do it for free. Get the codes and post them here and we will go from there.
Jan 13, 2018 at 3:45 AM
Advertisement