P0139 Engine Error Code
When you check car engine light came on code P0139 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However manufacturer may have a different definition for the P0139 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

Do you have fresh, clean fuel in the tank? If it's empty, fill it up and go! If it's full, check P0139 that the fuel shut-off valve is open and that it is clean. Stale fuel, dirt and debris are the most common cause of outdoor power equipment not starting properly. If you store equipment with untreated gas in the tank, it can lead to engine damage.
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P0139 OBD-II Diagnostic Powertrain (P) Trouble Code Descriptioncar P0139 OBD-II Trouble Code 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)Reason For P0139 CodeThe reason of P0139 OBD-II Engine Error Code is P0139 O2 Sensor Circuit Slow Response Bank 1 Sensor 2. |
When you turn on the ignition, the Service Engine Soon or Check Engine P0139 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If P0139 so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the !
P0139 Possible Solution :
In-line Ford engines, along with those of most other manufacturers, begin the numbering of cylinders at the front and proceed in numerical order toward the back. In the V-engine design, Ford follows a similar design with the number one cylinder at the front left of the engine. In the V-6 configuration, cylinder 4 is at the front right of the engine and in a V-8, cylinder number 5 is in that location. Other manufacturers sometimes use an alternating pattern in the V-engines.
What does fault code P0139 mean for ?
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