How many O2 sensors does a 2007 Acura MDX have?

Oxygen sensors are located before and after the catalytic converter. A vehicle may have two to five oxygen sensors, and sometimes even more.

How many O2 sensors does a 2004 Acura MDX have?

According to the 2003/2004 Maintenance manual, there are four 02 sensors. Two sensors are located immediately upstream of both of the warm up three way catalytic converters, which are attached to the exhaust manifold on each bank of the engine.

Where are the O2 sensors?

The sensor is typically located on the passenger side of the car, mounted directly onto the exhaust pipe near the catalytic converter. When the sensor goes bad, your car may lose up to 40 percent of its fuel efficiency, because your car will use too much gas.

What does code po134 mean?

The P0134 diagnostic trouble code is an indication that there is a problem with the oxygen sensor that is positioned before the catalytic converter and on the engine bank that houses cylinder #1.

How many O2 sensors does a 2004 Acura TL have?

For the TL, there are four different O2 sensors: two located before the cats (upstream) and two after (downstream).

What are the symptoms of a p2251 trouble code?

Symptoms of a P2251 trouble code may include: Reduction in fuel efficiency Diminished engine performance Stored misfire codes or lean/rich exhaust codes Service engine soon lamp illumination

What does p2251 mean on an O2 sensor?

Although generic, the exact repair steps may vary depending on year, make, model and powertrain. A stored code P2251 means that the powertrain control module (PCM) has detected a negative current discrepancy in the upstream oxygen (O2) sensor for engine bank number one. Bank one is the engine bank that contains the number one cylinder.

What does a stored code p2251 in PCM mean?

A stored code P2251 means that the powertrain control module (PCM) has detected a negative current discrepancy in the upstream oxygen (O2) sensor for engine bank number one. Bank one is the engine bank that contains the number one cylinder. Sensor 1 denotes the upstream (pre-cat) sensor. The negative current control circuit is a ground circuit.