HO2S Insufficient Switching Sensor 1
Table of contents
P1133 HONDA Possible Causes
- Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
- Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 harness is open or shorted
- Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 circuit poor electrical conection
- Air leak in exhaust near O2 sensor
How do I fix code P1133 HONDA?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1133 HONDA code
The cost of diagnosing the P1133 HONDA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
If the Powertrain Control Module (PCM) determines that the front HO2S did not switch enough times, the PCM will set the P1133 code.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1133 HONDA Description
The Engine Control Module (ECM) monitors the Heated Oxygen Sensor (HO2S) activity for 90 seconds after closed loop operation has begun. The ECM determines if the front HO2S is functioning properly by counting the number of HO2S-1 Lean/Rich (L/R) and Rich/Lean (R/L) switches.