Im having some problems my truck is gettings codes for the injectors and is not reading any air/fuel ratios they are all on 0% and im also getting MAF sensor code and it has absolutely no power and if i floor it the tranny slips im thinkin its the MAF thats bad but it doesnt make any sence why im getting a code for the injectors and it feels like its not getting any fuel. misfire code is also on any ideas on wht it mite be. All replys are appreciated. Thanks David.

 

It would help if you would include the actual code number (ex P0300).

 

P0200, P0101 and P0300.

 

It is most likely that P0200 and P0300 are related. Whichever cylinder or cylinders are misfiring are probably showing injector fault codes. Do you know which cylinder(s) is misfiring? If you know which cylinder is misfiring, disconnect the injector harness for that cylinder and with a test light connected to ground with the key on check for voltage on the pink wire at the injector connector. If you have power, then connect the test light to battery positive then probe the black wire at the injector connect either while the engine is running or while someone cranks the engine over. The test light should blink is the PCM is supplying an injector pulse. If this checks out it is probable that you have a bad injector, if not it is either a wiring issue or PCM issue. Could you also include year and what engine you are working on?

 

Not so sure that I'd do that with a test light, as it doesn't have enough resistance in the bulb and could smoke the injector driver in the PCM, better off using a high impedance multimeter...