Check engine light on Per my CP9125 OBD II PocketScan Code reader codes were p1131 and p0133 pd Not finding a specific definition for p1131 but I believe it has to do with the powertrain, nothing specific though p0133 is O2 sensor CKT slow response (Bank 1 Sensor 1) also read it was running rich Is this something that can be adjusted or does it need replacing?

remove the unit from the power for one or two hours

and it will get reset

Here's a link to code P 0133. P0133 OBD II Trouble Code Here's a link to code P0455. P0455 OBD II Trouble Code

next to the hood release just below it

its hard at find take it to an authorized garage they will find the problem by attaching the company computer software

P0133 OBD-II Trouble Code Technical Description

Oxygen Sensor Circuit Slow Response (Bank1, Sensor1)
What does that mean? This involves the front oxygen sensor on Bank 1. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.
Symptoms You will likely not notice any drivability problems, although there may be symptoms.
Causes A code P0133 may mean that one or more of the following has happened:

• The oxygen sensor is faulty
• The wiring to the sensor is broken / frayed
• There is an exhaust leak

Possible Solutions The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is more than likely the front Bank 1 oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:

• Check and fix any exhaust leaks
• Check for wiring problems (shorted, frayed wires)
• Check the frequency and amplitude of the oxygen sensor (advanced)
• Check for a deteriorating / contaminated oxygen sensor, replace if necessary
• Check for inlet air leaks
• Check the MAF sensor for proper operation

Not sure about the PD code.

It is the front sensor, if your car is the type that has 2 front sensors it will be the one closest to the timing chain / belt (left hand side of engine)

This GM's definition of this code:
P1404 - Exhaust Gas Recirculation (EGR) Closed Position Performance
The most common reasons are either the EGR valve position sensor is defective, or the EGR valve is not fully closed due to carbon.

Sometimes you can reset the engine warning light by disconnecting the battery for ten minutes or more (be sure you have your stereo unlock code if needed).
That is not a good solution, it is better to diagnose and eventually fix the problem.
Have the car computer scanned with a code reader, the codes you get in return witll tell you exactly where to find the problem.

Here is the code list.

To get the codes the code reader must be connected to the car computer.


sometimes on Bmw you may need a Interface 16 pin Adapter, depending on the code reader.

Here is a home user code reader : PocketScan™ OBD II Code Reader (AXRCP9125 ...

Here is a good scaner.

Always better having the job done at a qualified garage.

Based on what the tech manuals say I would change the DPFE sensor for the EGR Valve, careful not to tear the special silicone rubber hoses that go to it from the exhaust, as a Ford dealer tech I saw these codes allot, and the DPFE sensor was almost always the issue or the hoses going to it.