Audi A8 P0139 Engine Error Code

When you check Audi A8 car engine light came on code P0139 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Audi 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.

A good ground connection is also extremely important. P0139 Audi A8 engine problem because the presence of voltage at the panel harness won't make the panel work if there is a bad ground connection. Since the instrument cluster is mounted in a plastic dash, a separate ground wire or ground circuit through the wiring harness is usually needed to complete the power circuit. Refer again to the wiring diagram to find the ground path, and then check it with your ohmmeter. Do not use a self-powered test light because it cannot measure resistance (any resistance will lower circuit voltage).

Audi A8 P0139 OBD-II Diagnostic Powertrain (P) Trouble Code Description Audi A8 car 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 Audi A8 P0139 Code The reason of Audi A8 P0139 OBD-II Engine Error Code is P0139 O2 Sensor Circuit Slow Response Bank 1 Sensor 2.

There are currently two main types of cylinder deactivation used today, depending on the type of engine. P0139 Audi A8 code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed.

Audi A8 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 Audi A8 ? What does a diagnostic reading P0139 mean for Audi A8 ? How to fix OBD2 Code P0139 for Audi A8 ? What do we know about P0139 code for Audi A8 ?