CAR OBD CODES
OBD/DTC Search, e.g.P0200
CAR OBD CODES P0200
P0200 OBD Code Definition:
P0200 Injector Circuit Malfunction
P0200 OBD Code Description:
OBD2 Code P0200 Definition:
In sequential fuel injection the PCM (Powertrain Control Module) controls each injector individually. Battery voltage is supplied to each injector from, usually, the power distribution center (PDC) or other fused source. The PCM supplies the ground circuit to each injector by means of an internal switch called a “driver”. The PCM monitors each driver circuit for faults. For example, when a fuel injector is commanded “off” by the PCM, it expects to see a high voltage on the driver ground circuit. Conversely, when a fuel injector is commanded “on” by the PCM, it expects to see the voltage pulled low on the driver circuit If it doesn’t see this expected condition on the driver circuit, P0200 or P1222 may set. Other injector circuit fault codes may set as well.
Symptoms
Possible sumptoms of P0200
Symptoms of a P0200 DTC may include: MIL (Malfunction Indicator Lamp) illumination Engine misfire at idle or at highway speed Engine may start and stall or not start at all Cylinder misfire codes may be present
Possible Causes
Possible causes of P0200
Potential causes of an P0200 code include: Open or shorted injector Injector low internal resistance (basically an injector that works, but is out of specs) Grounded driver circuit Open driver circuit Driver circuit shorted to voltage Wiring harness intermittently shorting against underhood components
Possible Solutions
1. If you have multiple misfire/injector codes, a good first step is to unplug all the fuel injectors and then turn the ignition on, engine off (KOEO). Check for presence of battery voltage (12 Volts) at one wire of each injector connector. If all are missing, check for continuity to ground on the voltage circuit by using a test light connected to positive battery and probe each voltage feed. If it lights up, then there is a short to ground on the voltage feed causing a short. Get a wiring diagram and repair the short on the voltage feed and reestablish proper battery voltage. (Don’t forget to check for a blown fuse and replace as necessary). NOTE: It’s possible for one injector to short out the whole battery voltage feed to all the injectors. So if you have lost voltage to all the injectors, replace the blown fuse and plug each injector in, one by one. If the fuse blows, the last injector you plugged in is shorted. Replace it and retest. If only one or two battery feeds are missing, then it’s more likely to be a shorted battery voltage feed in the individual injector wiring harness. Inspect and repair as necessary. 2. If you have battery voltage fed to each injector harness, then the next step is to get a noid light to check for injector driver operation. A noid light will insert into the injector harness in place of the fuel injector and flash rapidly when the injector driver operates. Check each fuel injector connector. If the noid light flashes rapidly then suspect the injector. Ohm each fuel injector if you have a resistance specification. If the injector is open or the resistance is higher or lower than the spec, replace the fuel injector. If the injector tests out, the problem is likely an intermittent wiring problem. (Remember that a fuel injector can work properly when cold but go open when hot, or vice versa. So it’s best to do these checks when the problem is occurring). Check the wiring harness for any chafing, or the injector connector for loose pins or a broken lock. Repair as necessary and retest. Now, if the noid light doesn’t flash, then there’s a problem with the driver or the driver circuit. Unplug the PCM connector and ohm the fuel injector driver circuits. Any resistance means there’s a problem. Infinite resistance points to an open in the circuit. Find it and repair it, then retest. If you can find no problem with the harness and there is no fuel injector driver operation, then check the PCM powers and grounds. If they are okay, the PCM may be at fault.
Note: The information on the P0200 error code is purely informative, if you need more useful information, please consult your technician.
B2243 B1660 B118A B1848 B2475 B1686 B1299 B12B4 B2882 B2708 B10B3 B111D B2604 B2222 B2179 OBDII Chassis Codes
C1521 C0504 C1936 C1200 C1439 C1881 C0039 C1259 C003E C0750 C1178 C1168 C1765 C1412 C1163 OBDII Network Codes
U0499 U0319 U1003 U1006 U1050 U0321 U0594 U0514 U0241 U0043 U055D U1150 U0217 U0179 U0292 OBDII Powertrain Codes
P1395 P0BA9 P20D9 P2428 P1564 P0B60 P0AA7 P252F P2BAD P1651 P222A P0483 P0977 P2303 P0739