CAR OBD CODES
OBD/DTC Search, e.g.P0203
CAR OBD CODES P0203
P0203 OBD Code Definition:
P0203 Fuel Injector, Cylinder 3 Activation
P0203 OBD Code Description:
OBD2 Code P0203 Definition:
P0203 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 resitance in the circuit. If the resistance is excessively low or high it will set this code.
Symptoms
Possible sumptoms of P0203
The symptoms for this code will likely be a misfire and a rough running engine. Poor acceleration. The MIL will also be illuminated.
Possible Causes
Possible causes of P0203
The causes of a P0203 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 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
Note: The information on the P0203 error code is purely informative, if you need more useful information, please consult your technician.
B10A0 B2AEA B2663 B2288 B3477 B2660 B00DF B1529 B1D88 B10B6 B2427 B2809 B1298 B1003 B129B OBDII Chassis Codes
C101E C1410 C173B C1A35 C0324 C101C C0082 C1473 C0495 C2788 C1902 C1A83 C1A78 C1921 C170C OBDII Network Codes
U0293 U2051 U1224 U0087 U2428 U1012 U0503 U017C U1260 U011D U2528 U0004 U059A U0145 U0264 OBDII Powertrain Codes
P269E P0C6F P0250 P0853 P2A09 P3444 P1489 P0BB9 P0152 P2276 P02F8 P02AA P0642 P071F P0C50