Fuel & air metering · Powertrain · generic (SAE-defined)
P0207: Injector Circuit/Open - Cylinder 7
P0207 means there is an electrical problem, usually an open circuit, in the cylinder 7 fuel injector circuit, which applies to engines with seven or more cylinders, typically V8s.
Standard title per SAE J2012 / ISO 15031-6 · Updated 2026-11-07 · By CarWhere Research
How P0207 sets
The powertrain control module (PCM) drives the cylinder 7 injector and monitors its circuit for the expected electrical feedback. An open circuit, short or failed response triggers P0207. Monitoring strategy is manufacturer-specific.
Common causes of P0207
Roughly most likely first; the actual cause depends on the vehicle and needs testing to confirm.
- Failed cylinder 7 fuel injector
- Open or chafed injector harness wiring
- Corroded or loose connector
- Injector power supply problem
- PCM driver fault (uncommon)
P0207 symptoms
- Check engine light on, possibly flashing
- Rough idle and shaking
- Reduced power
- Cylinder 7 misfire code P0307 may set
How P0207 is diagnosed
- Scan for codes, including P0307 and any other injector codes.
- Confirm the location of cylinder 7 in service information, since numbering varies between manufacturers.
- Inspect the injector connector and harness.
- Measure injector coil resistance.
- Check injector pulse with a noid light and verify the power and control circuits.
Typical fixes for P0207
- Replace the cylinder 7 fuel injector
- Repair the harness or connector
- Correct the injector power supply
- Repair the PCM if needed
Replace parts only after testing confirms the cause — a code names the circuit or condition that failed a check, not necessarily the faulty part. We don’t publish per-repair prices; for what households actually spend on upkeep, see car repair costs.
Related codes & warning lights
P0207 FAQ
What does code P0207 mean?
P0207 means there is an electrical problem, usually an open circuit, in the cylinder 7 fuel injector circuit, which applies to engines with seven or more cylinders, typically V8s. The standard definition is "Injector Circuit/Open - Cylinder 7."
Can I drive with a P0207 code?
Minimize driving until it is repaired. A dead cylinder 7 injector leads to a misfire that can overheat the catalytic converter, and a flashing check engine light means pull over and stop soon.
Which side of a V8 is cylinder 7 on?
It depends on the manufacturer. Some number cylinders down one bank and then the other, while others alternate between banks, so check service information for your engine.
Can P0207 be intermittent?
Yes. A wire that breaks inside the insulation or a loose terminal may open only when hot or when the engine moves, causing the code to come and go.
Keep researching
Engine guides by brand (known issues, specs)
More fuel & air metering codes
Sources
- SAE J2012 — Diagnostic Trouble Code Definitions (standard code titles)
- ISO 15031-6 — Road vehicles: communication between vehicle and external equipment for emissions-related diagnostics, Part 6: Diagnostic trouble code definitions
- U.S. EPA — Vehicle Emissions Inspection and Maintenance (I/M) programs
- U.S. EPA, 40 CFR 86.1806-17 — Federal onboard diagnostics requirements for light-duty vehicles
- California Air Resources Board — On-Board Diagnostic (OBD) Program
General information written by CarWhere Research, not a diagnosis of your vehicle. Manufacturers can add their own sub-definitions and test conditions; confirm with the factory service information for your year, make and model. Before paying for a repair, check NHTSA for open recalls and your warranty booklet: federal law requires an emissions warranty on major emission-control parts such as the catalytic converter and engine computer.