Gennadiy1986
P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2) можно и так ее озвучить
HO2S12 Circuit Fault
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust
Possible causes
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Rear Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
Tech notes
Replacing the rear O2 Sensor bank 1 usually takes care of the problem.
When is the code detected?
It takes more time for the sensor to respond between rich and lean than the specified time.
P0136 Description
The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.
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P0628 Low Voltage Detected At The Fuel Lift Pump
Possible causes
- Fuel lift pump circuit open or short
- Faulty fuel lift pump
Tech notes
Usually the solution to the problem is the fuel lift pump
When is the code detected?
- Engine Light ON (or Service Engine Soon Warning Light)
P0628 Description
The commanded signal to the fuel lift pump does not match the feedback signal