Question about 1994 BMW 3 Series

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2002 525I keeps failing emission due to CO

We have change the cam sensor. We place d on machine it give the following codes

12 - Exhaust Position Sensor
A8 - Coolant Thermostat jammed open

What do I change?

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  • BMW Master
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Go with the thermostat first. If thermostat remains open the engine will continuously run rich and will never pass an inspection. Other codes may be in reaction to the thermostat problem.

Posted on Jul 14, 2009

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1 Answer

Where is cam shaft sensor located on a 08 saturn aura


Which engine ? This vehicle had option of six different engines , 2.4 , 3.5 , 2.8 , 3.0 , 3.2 , 3.6 And are you picking on the right part ? What code > DTC P0010: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit

DTC P0013: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit
It may not even be a cam sensor problem !
DTC P0340: Intake CMP Sensor Circuit

DTC P0365: Exhaust Camshaft Position (CMP) Sensor Circuit
DTC P0341: Intake Camshaft Position (CMP) Sensor Performance

DTC P0366: Exhaust Camshaft Position (CMP) Sensor Performance
Camshaft Position (CMP) Actuator System
The camshaft position (CMP) actuator system is an electro-hydraulic operated device used for a variety of engine performance and operational enhancements. These enhancements include lower emission output through exhaust gas dilution of the intake charge in the combustion chamber, a broader engine torque range, and improved fuel economy. The CMP actuator system accomplishes this by changing the angle or timing of the camshaft relative to the crankshaft position. The CMP actuator simply allows earlier or later intake and exhaust valve opening during the four stroke engine cycle. The CMP actuator cannot vary the duration of valve opening, or the valve lift.
During engine OFF, engine idling conditions, and engine shutdown, the camshaft actuator is held in the Park position. Internal to the CMP actuator assembly is a return spring and a locking pin. During non-phasing modes of the camshaft, the return spring rotates the camshaft back to the Park position, and the locking pin retains the CMP actuator sprocket to the camshaft


It may

Jul 06, 2016 | 2008 Saturn Aura

1 Answer

What does it mean when it says co


CO? That means Carbon Monoxide - it's a rather toxic and poisonous gas emitted from the exhaust system.

When they check emissions on cars CO is one of the gases they measure. If the level is too high .. your car fails the emissions test. I believe in the USA the emissions test is known as the 'smog test'?

If you have a problem with excess CO emissions on a car the cause is often an incorrect fuel/air mixture or a faulty sensor called the lambda/oxygen sensor in the exhaust system

May 12, 2016 | Cars & Trucks

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C15001993 truck 4.3 v6 Failed Emissions HIGH CO again


Sounds like you lost O2 Control

Check fuel trim & data with professional
scanner & such

You done as far as working at home, you did all
you can

You have a rich condition (CO)

Seems as though the coolant sensor is not working &
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Prius 2006 diagnostic code poo16


Here is the definition.
The crank and cam sensors are telling the computer the cam is not in the place it should be.

P0016 TOYOTA Description The Engine Control Module (ECM) controls the Oil Control Valve (OCV) to regulate the intake camshaft angle. As a result of the angle change, the engine timing is advanced or not. Optimizing engine timing will help the engine improve torque and fuel economy, and the exhaust emissions decrease under overall driving conditions. The Variable Valve Timing (VVT) system includes the Oil Control Valve (OCV) and VVT controller. The ECM detects the actual intake valve timing using signals from the camshaft and crankshaft position sensors, and performs feedback control.
Read more: http://engine-codes.com/p0016_toyota.html#ixzz24sNXERyL

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I have a 93' Ford Taurus that failed emissions


run the fault codes to find the faulty sensor
sensors that control the exhaust emissions are the HO2S ( heated oxygen sensors in the exhaust manifold/s
the O2 sensor ( oxygen sensors after the cat converters ) and the EGR unit that recycles exhaust gas back through the engine to re-burn the gasses

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HELLO, I HAVE TROUBLE CODES PO330,PO340, ON MY OBD2 READER WITH THE MAINT LIGHT ON IN 96 BMW Z3 ROADSTER 4CYL., PO330 IS KNOCK SENOR, PO340 IS CAMSHAFT POSITION SENOR, I WANT TO KNOW HOW TO FIX THEM BOTH....


The Cam Position Sensor is a common item to fail. However, the cam positioning mechanism can fail too giving that code.

There are two sensors and the Exhaust Cam Sensor is most common to fail. I always replace both.
Te CKP's are on the top front of the engine next to the cylindrical operation solenoids.

Knock sensors fail too and need checked or correct feedback to ECU with a scanner.
Find a shop near you at http://www.iatn.net/shopfinder/

These engines require regular oil changes with quality synthetic oils and OE filter....not a FRAM or WIX !

Buy only BMW sensors ...aftermarket have high failure rate.

Jan 12, 2011 | 1996 BMW Z3 Roadster

2 Answers

Emissions failing with high NOx


Change the lambda/oxygen sensor in the exhaust.

May 21, 2009 | 1994 Mitsubishi Galant

1 Answer

Emission test failed.


daves944 is dead right . you could try thrashing the ars of it just befor it go in again most mot places will do it for you if you ask them ,, but be warned if it go bang witch it should not its not ther fault,,,, it has worked for me more then once

Mar 28, 2009 | 1994 BMW 3 Series

1 Answer

2000SATURN SL2 CODE CLASS 2 SHORT TO BATERY


To BIGHWEELS197, take your car to AutoZone and have them scan the computer - they'll do it for free, whereas the dealer will charge an hour's labor. Post the codes here and we can determine the problem.

To wjcomet, here are your code definitions:

P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1) - this means that the primary O2 sensor on the bank of cylinders with cylinder number 1 in it is not heating up quickly enough. The heating element is eventually getting it to temperature (it has to be heated up to work) but it's getting to be too long to heat up, which can fail you for cold-start emissions. You'll have to replace this sensor eventually.

P0341 Camshaft Position Sensor “A” Circuit Range/Performance (Bank 1 or Single Sensor)

This indicates a problem with your cam angle sensor. It could be that the sensor's pickup is not working right anymore (this does happen) but it could also be because your O2 sensor isn't getting to temperature soon enough and excess emissions are being detected, the car's computer may think that the cam position is off. If the cam isn't timed right, excess emissions can happen, so the computer may believe that's what is happening. I wouldn't be surprised however if the O2 sensor that's going bad is causing this code as well.

P0404 Exhaust Gas Recirculation Control Circuit Range/Performance

Indicates a failure of the EGR valve. Again, there's a chance that the failing O2 sensor can trigger this.

P1404 is a manufacturer-specific auxiliary emissions control failure code. I don't have access to that code's definition for your car, but again it's likely to be a result of the O2 sensor fault that you're having, since it's emissions-related and the O2 sensors are the main controllers of emissions on a car.

My advice would be to change that O2 sensor, have the codes reset, and see which ones, if any, return. If none come back, you likely had only the O2 problem and that fault caused the other codes as well. If one or more of the codes returns, we'll have to troubleshoot those individually.

Oct 07, 2008 | 2000 Saturn SL

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