P0200
Injector Circuit/Open
- Severity
- High
- Driving
- Short journeys only
A fault in an injector circuit, without the module naming which cylinder. The injector is the valve that sprays fuel into the engine, and the module opens it by switching its winding; an open or shorted circuit means that cylinder gets no fuel, or the wrong amount.
Possible causes
- CommonFailed injector - open or shorted winding
- CommonCorroded or damaged connector at the injector
- CommonChafed or heat-damaged wiring in the injector harness
- PossibleBlown fuse or failed relay on the injector supply
- PossibleOil or fuel in the connector from a leaking seal
- RareFailed control module driver
What you might notice
- Misfire - the engine shaking, especially at idle
- Loss of power and hesitation
- Hard starting or no start
- Smell of unburnt fuel
- Check engine light on, or flashing
What to check, in order
- Read all codes. A misfire code for the same cylinder alongside this one confirms which cylinder is not firing.
- Measure the injector winding resistance and compare it with a known-good injector on the same engine. Comparing against its neighbours is often more useful than a specification.
- Swap the connector - not the injector - with a neighbouring cylinder and see whether the fault follows. If it does, the fault is in the injector; if it stays, it is in the wiring.
- Inspect the connector for corrosion, and for oil or fuel that has crept in through a failed seal.
- Check the injector harness for chafe and heat damage. It sits directly on top of a hot engine and gets disturbed at every service.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Fuel and air metering - injector circuits
P0200P0201P0202P0203P0204P0205P0206P0207P0208P0209P0210P0211P0212P0213P0214P0215P0216P0217P0218P0219P0220P0221P0222P0223P0224P0225P0226P0227P0228P0229P0230P0231P0232P0233P0234P0235P0236P0237P0238P0239P0240P0241P0242P0243P0244P0245P0246P0247P0248P0249P0250P0251P0252P0253P0254P0255P0256P0257P0258P0259P0260P0261P0262P0263P0264P0265P0266P0267P0268P0269P0270P0271P0272P0273P0274P0275P0276P0277P0278P0279P0280P0281P0282P0283P0284P0285P0286P0287P0288P0289P0290P0291P0292P0293P0294P0295P0296P0297P0298P0299