P0200
Fuel Injector Circuit/Open
The PCM has lost proper electrical control of one or more injector circuits. That usually means an injector is open internally, the connector is loose or corroded, the harness is damaged, or the injector power or control side has dropped out. Some vehicles add cylinder-specific injector codes with it, while others only set the general P0200 code.
- SEV
- 4/5
- DRIVE
- CAUTION
- DIY
- $20-$300
- SHOP
- $150-$800
Quick answer
What it means
Can you drive with it?
Most common causes
- Faulty fuel injector with an open or internally failed coil
- Corroded, loose, or damaged injector connector or wiring harness
- Open circuit, short, or blown power feed affecting one or more injectors
Typical repair cost
DIY usually runs $20-$300. Typical shop repair lands around $150-$800, depending on the root cause.
01 / Definition
P0200 means the PCM detected an injector circuit malfunction. The exact logic varies by platform, but the fault usually means the PCM saw an open circuit, short, abnormal resistance, or an injector response that did not match the commanded event. The root cause may be the injector itself, a corroded or loose connector, harness damage, a shared injector power supply problem, or a failed PCM driver after the rest of the circuit has been proven good.
02 / Drive status
With caution. Short trips may still be possible, but injector circuit faults can cause misfires, no-starts, catalyst damage, and unsafe loss of power. Limit driving until injector power, ground, and control signals are checked.
03 / Symptoms
- Check engine light
- Engine misfire
- Rough idle
- Lack of power
- Hard starting or no-start
- Fuel smell from exhaust
- Poor fuel economy
04 / Causes
| 1 | Faulty fuel injector with an open or internally failed coil | high |
|---|---|---|
| 2 | Corroded, loose, or damaged injector connector or wiring harness | high |
| 3 | Open circuit, short, or blown power feed affecting one or more injectors | high |
| 4 | Plugged or contaminated injector that also fails electrical checks under load | medium |
| 5 | PCM injector driver fault after injector and wiring tests pass | low |
05 / Diagnostic sequence
- 01Confirm P0200 and check whether cylinder-specific injector or misfire codes are stored with it.
- 02Inspect injector connectors and harness routing for corrosion, loose terminals, rub-through, melted insulation, or oil contamination.
- 03Verify injector feed voltage and the PCM control pulse with a meter, noid light, or scope before replacing parts.
- 04Measure injector resistance and compare the suspect injector to the rest of the set on the same engine.
- 05Check injector fuse, relay, and shared power feed because one supply fault can affect multiple injectors.
- 06If the vehicle only sets general P0200, use scan data, power balance, or scope patterns to isolate the affected cylinder or bank.
- 07Only condemn the PCM after injector, connector, harness, and shared power checks stay clean.
06 / Repairs
| 1 | Repair injector connector damage, poor terminal fit, or harness faults | $20-$180 |
|---|---|---|
| 2 | Replace the failed injector if resistance or command testing proves it is bad | $50-$350 |
| 3 | Restore injector fuse, relay, or shared power feed faults | $30-$200 |
| 4 | Clean or replace an injector that is both contaminated and electrically out of range | $20-$250 |
| 5 | Diagnose and repair PCM driver faults only after the rest of the circuit tests good | $200-$800 |
07 / Related codes
08 / FAQ
Does P0200 mean a fuel injector is bad?
Often yes, but not always. The fault can also be in the injector wiring, connector, fuse, relay, or PCM control side.
Can P0200 cause a misfire?
Yes. If an injector is not being powered or pulsed correctly, that cylinder can misfire and the engine can run rough.
What is the fastest first check for P0200?
Start with injector connector condition, injector resistance, and power or pulse checks. Those tests separate most injector faults from wiring or PCM problems.
Can a dirty injector set P0200?
Sometimes, but P0200 is mainly an electrical circuit code. A dirty injector matters more when it is also failing electrical tests or response checks.
09 / Source and method
- DATA BASIS
- OBD-II REFERENCE + OBD2.HELP
- METHOD
- STATIC VALIDATION
- SAFETY
- INFORMATIONAL
This page combines OBD-II diagnostic reference data with OBD2.help generated diagnostic guidance for code meaning, likely causes, and repair direction.
Publishing uses deterministic schema and build validation, plus manual spot checks on representative pages before release.
Safety-critical diagnosis and repairs should be confirmed with a qualified mechanic, especially when the vehicle is misfiring, overheating, or losing power.