Ok last week I put stainless works headers on my Z06 and all seemed well with the world, they sounded great, car ran a little rough at first but then smoothed out after a couple laps around the block. Yesterday I let one of the guys from work take it for a spin with me sitting shotgun, now he was not getting on it, but outta nowhere the check engine light came on, now I'm a BMW diagnostics tech, so things of this nature are not something new, I went to the shop used a scan tool that only went up to 99 and cleared faults due to the fact it could not read the faults because it was out dated.
I then began to drive home, smelled fuel like crazy at a stop light, looked in the rear view and saw grey/black smoke, and the engine made a tug tug tug sound, needless to say, this alarmed me so I shut her down, waited for the light to turn green then pulled over, checked all connections, and all seemed fine, it eventually stopped tugging and I got it home, but it still tugged a little at all the lights, my impression was that I had an injector stuck open causin a dead hole, but then I read up on here and found the manual diagnostics mode and found another thread that said this was an injector control problem. Has anyone had this code or anything similar in problems, sorry to write a book about it but hey I figured I'd get it all out! Any help would be great, thanks all!!!
Zach

 

Here is some info from the Service Manual. Sorry the diagnostic table doesn't print out well in the reply but you should be able to deduce what it is telling you.

Bill

DTC P0200
Circuit Description
The control module enables the appropriate fuel injector on the intake stroke for each cylinder. Ignition 1 voltage is supplied to the fuel injectors. The control module controls each fuel injector by grounding the control circuit via a solid state device called a driver. The control module monitors the status of each driver. If the control module detects an incorrect voltage for the commanded state of the driver, a fuel injector control DTC sets.
Conditions for Running the DTC
The engine speed is more than 400 RPM.
The ignition voltage is between 6-18 volts.
Conditions for Setting the DTC
The powertrain control module (PCM) detects an incorrect voltage on a fuel injector control circuit.
The condition exists for 5 seconds.
Action Taken When the DTC Sets
The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
Conditions for Clearing the MIL/DTC
The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.
Diagnostic Aids
Performing the Fuel Injector Coil Test may help to isolate an intermittent condition. Refer to Fuel Injector Coil Test .
For an intermittent condition, refer to Intermittent Conditions .
Test Description
The numbers below refer to the step numbers on the diagnostic table.

5. This step verifies that the PCM is able to control the fuel injector.

6. This step tests if a ground is constantly being applied to the fuel injector.

Step Action Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views


1
Did you perform the Diagnostic System Check-Engine Controls? Go to Step 2
Go to Diagnostic System Check - Engine Controls


2
1. Clear the DTCs with a scan tool.
2. Idle the engine at the normal operating temperature.
3. Monitor the misfire current counters with a scan tool.
Are any of the misfire current counters incrementing? Go to Step 4
Go to Step 3


3
1. Observe the Freeze Frame/Failure Records for this DTC.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition? Go to Step 4
Go to Diagnostic Aids

4
1. Turn OFF the ignition.
2. Disconnect the injector which displays the highest number of misfire current counters.
3. Turn ON the ignition, with the engine OFF.
4. Probe the ignition 1 voltage circuit of the fuel injector with a test lamp that is connected to a good ground.
Does the test lamp illuminate? Go to Step 5
Go to Step 11


5
1. Connect the J 34730-2C Fuel Injector Test Lamp between the control circuit of the fuel injector and the ignition 1 voltage circuit of the fuel injector.
2. Start the engine.
Does the test lamp flash? Go to Step 9
Go to Step 6


6
Does the test lamp remain illuminated? Go to Step 8
Go to Step 7


7
Test the fuel injector control circuit for the following conditions:
A short to voltage
An open
High resistance
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition? Go to Step 14
Go to Step 10


8
Test the fuel injector control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition? Go to Step 14
Go to Step 13


9
Test for an intermittent and for a poor connection at the fuel injector. Refer to Testing for Intermittent and Poor Connections and Repairing Connector Terminals in Wiring Systems.
Did you find and correct the condition? Go to Step 14
Go to Step 12


10
Test for an intermittent and for a poor connection at the PCM. Refer to Testing for Intermittent and Poor Connections and Repairing Connector Terminals in Wiring Systems.
Did you find and correct the condition? Go to Step 14
Go to Step 13


11
Important
The INJ fuse also supplies voltage to the ignition coil modules. If the fuse is open, inspect all related circuits and components for a short to ground. Refer to Circuit Testing in Wiring Systems.
Test the ignition 1 voltage circuit of the fuel injector for:
An open
High resistance
A short to ground
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition? Go to Step 14
--

12
Replace the fuel injector. Refer to Fuel Injector Replacement .
Did you complete the replacement? Go to Step 14
--

13
Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement .
Did you complete the replacement? Go to Step 14
--

14
1. Clear the DTCs with a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition? Go to Step 2
Go to Step 15


15
Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed? Go to Diagnostic Trouble Code (DTC) List
System OK

 

thanks a lot Bill, big help, turns out it was two bad injectors!