P2270 - Freestar Ford Cars & Trucks

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https://www.obd-codes.com/p2270
https://www.yourmechanic.com/article/p2270-obd-ii-trouble-code-o2-sensor-signal-stuck-lean-bank-1-sensor-2-by-jay-safford

http://www.obd-codes.com/p2270


http://www.obd-codes.com/p2197

This P2270 trouble code refers to the post-catalytic converter O2 (oxygen) sensor on bank #1, sensor #2.

Check this site:
P2270 O2 Sensor Signal Stuck Lean B1S2

P2270 O2 Sensor Signal Stuck Lean B1S2

It's the O2 sensor attached to your exhaust pipe behind the catalytic convertor that has detected your exhaust is too lean. It could mean any of a variety of issues from simply the sensor is faulty, to the sensor being loose fitting, to a leak in the exhaust before the sensor, to a bad fuel injector ---- essentially, anything that can reduce the amount of fuel emission that "should" be present.

Bank 1 Sensor 2 signal is indicating a lean condition, replace the O2 sensor. Right side (passenger) after the Cat.

The P2270 is a fairly straight forward code pointing to a fault in the downstream heated oxygen sensor (B1S2). Basically, it's not switching in the alotted time that on-board computer needs to see. Carefully inspect the wire harness and electrical connector for any loose, broken, pinched or rubbed through wires. Make sure there are no current exhaust leaks in the system. If the visual inspection checks ok, replacing the sensor should solve the problem.Bank 1 is on the passenger side and sensor 2 is by the cataytic convertor.

Use Google to look up the code

2009 Pontiac OBD Code P2270

DTC P2270: Rear Secondary HO2S (Bank 1, Sensor 2) Circuit Signal Stuck Lean

Is this the only code that is coming up? If so, replacing the Bank 1 Sensor 2 Oxygen sensor should fix it. If there are any other engine/drivetrain/emissions related codes, I would recommend ignoring this code for now and fix the other things first, then retest the vehicle to see if this code comes back.

For more information about locating oxygen sensors and repairing oxygen sensor codes, please review the following article:

Which Oxygen Sensor Is It?

What Else Could Be Wrong?

P2270 - 02 Bank 1 Sensor 2 signal stuck lean

Switch Sensor indicates lean, this is on the passenger side after the Cat, you will need another sensor. It could be a bad sensor, bad wire connection, I would have replaced all, I know it would have been 200 dollars but now it only 150 to do the remaining three and still cheaper then going to the dealer plus you get four new sensors.

Hope this helps.

According to my book, it looks like a bad O2 sensor, the sensor behind the catalytic converter on the passenger side exhaust.

Bank 1, Sensor 2.

You can pick one up at the parts store for around $75.