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Dodge Oxygen Sensor Questions

Do you wonder what an oxygen sensor has to do with the smooth running of an engine? Need to know if it is advisable to use aftermarket oxygen sensors? Need to know why would an oxygen sensor consistently fail? Have oxygen sensor questions and looking for answers?

Oxygen sensors play a key role in engine performance and mileage, largely because on their signals the onboard computer determines the amount of fuel injected into an engine. Oxygen sensors are prone to failure for a number of reasons many of which are avoidable. Experts should be consulted when there is doubt about oxygen sensor performance.

Read below to know how Experts have answered some questions asked about Dodge oxygen sensors.

Will a faulty Dodge oxygen sensor cause a vehicle to run rough?

The oxygen sensor has a huge role to play in how much fuel is injected into an engine which runs in a closed loop, especially at time of starting. A bad oxygen sensor will send wrong signals impacting engine performance. However, there are several other reasons for an engine to run rough. The best way to determine the cause is to check the fault codes set when the engine light comes on.

Why does an oxygen sensor keep failing after code P0139 is set?

Frequent failure could be due to a flange or manifold gasket leak which will permit outside air to be sucked into the exhaust system and set this fault code. Failure can also be caused by a small exhaust leak. The best way to check for this is to smear a soapy solution to all welds and joints on a cold exhaust system and apply air at 5 psi pressure. Watch closely because there could be a small pinhole leak which is scarcely visible. Even this is sufficient to set the fault code and sensor failure.

On a Dodge Ram pickup where is the bank 1 oxygen sensor located?

Each bank on this engine would have its own small catalytic converter mounted just downstream of the exhaust manifold collectors. The upstream oxygen sensors on both banks will be located between the converter and the collector. The left side is bank 1 and the right bank 2.

Why does code P0032 display frequently and the upstream oxygen sensor has to be replaced on a Dodge Grand Caravan?

In general most codes relating to oxygen sensors are because of a faulty oxygen sensor, but before making a replacement the cause should always be properly diagnosed. A repair facility which has consistently replaced the oxygen sensor because it was faulty without proper diagnosis should assume some responsibility for their recommendation.

The need for frequent replacement could also have arisen if substandard aftermarket sensors were used. Aftermarket sensors are often unreliable and known for premature failure. Another possibility is that the replacement was being made with entirely the wrong sensor causing it to fail repeatedly. If another failure should occur the repair shop should conduct a comprehensive diagnostic test on the computer, wiring and sensor at no charge.

How to replace the upstream oxygen sensor on a ’96 Dodge Caravan?

The upstream oxygen sensor on this engine is fixed to the exhaust manifold. Here is the replacement procedure:
• Jack up the vehicle
• Unplug the electrical connector to the oxygen sensor taking care not to pull the oxygen sensor wire
• Remove the sensor using the right socket –a Snap-On YA8875 or its equivalent
• Clean the exhaust manifold threads with an 18x1.5 mm +6E tap
• If the replacement is being made with an original sensor coat the threads with an anti-seize compound
• To install, reverse the procedure
• When tightening the replacement apply no more than 27Nm torque

Where are the oxygen sensors located on a Mitsubishi 6G73 engine and why are they referred to by banks?

Bank 1 is generally referred to the side where cylinder #1 is located which, in this engine, is the front. Bank 2 is the opposite side or the rear on the Mitsubishi 6G73. Oxygen sensor 1 is upstream of the catalytic converter and sensor 2 is after it. Sensor 1/1 would refer to the sensor on bank 1 ahead of the cat, and sensor 1/2 would be after the cat on the same bank. 2/1 and 2/2 would refer to their opposite numbers on bank 2. Oxygen sensors are screwed into the exhaust manifold.

Because of their importance in engine performance owners often seek information about oxygen sensors, how they work, and what are the signs that they are malfunctioning. The best way to get reliable answers is by asking Experts who are always available to assist with problems on Dodge oxygen sensors.
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