P0200 on 1990-1996 Nissan 300ZX (Base (NA), 2+2, Turbo (TT)) — Injector Circuit/Open
1 vehicles · 1 makes · $100-$800 repair
How to diagnose and fix P0200: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Nissan 300ZX · 1990–1996
The Z32's six factory fuel-injector connectors (early EV1-style plugs) and the injector sub-harness sit directly atop a hot intake and are subjected to decades of underhood heat cycling. The connector plastic becomes brittle, the terminals corrode/oxidize, and the wiring insulation hardens and cracks — sometimes literally melting/discoloring at the plug. On twin-turbo cars the harness runs even hotter. The result is intermittent or dropped injector signal, most often on cylinders that live closest to the turbos/heat. This is one of the single most common driveability complaints on aging Z32s and is considered a maintenance item, not an if.
Common Symptoms
- Random misfire or stumble, often warm
- Rough idle that comes and goes
- One or more cylinders intermittently dropping out
- Power loss / hesitation under load
- Melted, discolored, or crumbling injector connector plastic
- Corroded green terminals inside the injector plug
How to Fix
Replace the six injector connector pigtails with heat-resistant plug-and-play repair kits (solder or crimp the new EV1 plugs onto the existing sub-harness leads), or replace the entire injector sub-harness. Owners frequently refresh the injectors themselves at the same time since access is already open. Clean/inspect the ECU and injector grounds while in there.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Z1 Z32 early-style injector connector and terminal kit
Z32 with early square-style injectors; verify injector and harness connector before purchase.
- Z1 Z32 5-speed EFI engine wiring harness
1990-1995 LHD factory five-speed Z32 NA or TT only; not automatic or five-speed-converted cars. Select old/new/hybrid injector and CAS connectors and note 1990-1992 AIV omission.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (3)
Find P0200 by make
Browse every documented model and issue for your make.
P0200 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0200 mean?
P0200 stands for "Injector Circuit/Open." Generic injector circuit fault. The PCM commands the fuel injectors on and off via internal driver transistors and monitors each circuit for proper voltage and current. P0200 sets when the PCM detects an open or out-of-range condition affecting the overall injector circuit (rather than one specific cylinder) — often pointing to a shared component such as the injector power feed, main relay, or fuse.
What are the most common causes of P0200?
The most common causes of P0200 are: Open or shorted injector wiring harness between PCM and injectors, Blown injector fuse or failed injector/main relay (shared power feed), Corroded, loose, or backed-out injector connector, Faulty fuel injector (internal open winding), Failed PCM injector driver. The specific cause varies by vehicle.
How much does it cost to fix P0200?
Repair costs for P0200 range from $100 to $800, depending on the vehicle and root cause.
Which vehicles are affected by P0200?
Au7o has documented P0200 across 1 vehicle models from 1 manufacturers: Nissan.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.