Auto Answers » View Question
bfraaken
bfraaken 6/3/2012
1998 Dodge B1500 Base 8Cyl5.2L - Engine
My van has a po206 code two shops said it was the PCM we replaced it and still the same code
Injector open circuit
2 Answers
  • Hot Wheelz Automotive II
    Granted, I don't own the shops you went to..... however.... a noid light test should be done first. Then test then the continuity (having a complete circuit) test should be done from the injector plug to the corresponding pin at the PCM. I have seem too many harness either have an open circuit or too high of resistance.... and many PCM plugs have issues.
    Reply
    0
  • Jimm
    Jimm 6/3/2012
    P0206 = Injector Circuit Malfunction - cylinder number 6

    P0206 means that the PCM detected a fault in the injector or the wiring to the injector. It monitors the injector and when the injector is activated, the PCM expects to see the voltage pulled "low" or close to zero. When the injector is switched off, the PCM expects to see a voltage that is close to battery voltage or "high". If it doesn't see the expected voltage the PCM will set this code. The PCM also monitors resistance in the circuit. If the resistance is excessively low or high it will set this code.

    A malfunctioning PCM would not set this specific code - no need to replace the PCM with a code P0206.

    Potential Symptoms

    The symptoms for this code will likely be a misfire and a rough running engine. Poor acceleration. The MIL will also be illuminated.

    Causes
    The causes of a P0206 engine light code could be any of the following:

    Bad injector. This is usually the cause of this code but doesn't rule out the possibility of one of the other causes
    Open in the wiring to the injector
    Short in the wiring to the injector
    Bad PCM

    Possible Solutions
    First, using a DVOM check the resistance of the injector. If it isn't within specs, then replace the injector.
    Check for voltage at the fuel injector connector. It should have 10 volts or more.
    Visually check the connector for damage or broken wires.
    Visually check the injector for damage.
    If you have access to an injector tester, activate the injector and see if it operates. If the injector operates, then you likely have either an open in the wiring, or a blocked injector. If you do not have access to a tester, swap the injector with another one and see if the code changes. If the code changes, then change the injector.
    At the PCM, remove the driver wire from the PCM connector and Ground the wire. (Make sure you have the correct wire. If you're not sure, do not attempt) The injector should activate
    Replace the injector
    Reply
    0
close

Preview Answer

 
AutoMD Verified Customer
AutoMD obtained proof this customer interacted with the shop.