P1133
09-26-2009, 11:41 AM
#1
Retired Senior Admin
Expert Gearhead
Thread Starter
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 28 Likes
on
24 Posts
P1133
P1133
Description
HO2S INSUFFICIENT SWITCHING SENSOR 1
PCM monitors Heated Oxygen Sensor (HO2S) activity for 100
seconds. PCM determines if HO2S 1 is functioning properly by counting
number of HO2S 1 Lean/Rich (L/R) and Rich/Lean (R/L) switches. If PCM
determines that HO2S 1 did not switch enough times, DTC 1133 is set.
Symptoms
You likely won't notice any drivability problems.
Causes
Description
HO2S INSUFFICIENT SWITCHING SENSOR 1
PCM monitors Heated Oxygen Sensor (HO2S) activity for 100
seconds. PCM determines if HO2S 1 is functioning properly by counting
number of HO2S 1 Lean/Rich (L/R) and Rich/Lean (R/L) switches. If PCM
determines that HO2S 1 did not switch enough times, DTC 1133 is set.
Symptoms
You likely won't notice any drivability problems.
Causes
- Engine operating in closed loop mode.
- Check exhaust system for leaks. Repair as necessary.
- Visually inspect HO2S 1 for secure installation or
corrosion on terminals. - Replace HO2S
Thread
Thread Starter
Forum
Replies
Last Post
