P0230 on Mitsubishi: How to Diagnose & Fix
Fuel Pump Primary Circuit Malfunction
1 Mitsubishi model · 1 documented issue · $75-$400 repair
P0230 on Mitsubishi by model: symptoms, diagnosis and fix
On 1995-1999 cars the fuel pump's factory wiring is undersized and its chassis ground (at the floor crossmember under the driver's seat) corrodes with age, dropping voltage at the pump into the 10-11V range under load. The paired fuel pump/MFI relay behind the center console can also fail. The result is intermittent cranking no-starts (no pump prime), stalling, and lean stumble or fuel cut at wide-open throttle on turbo cars — a problem so common the community-standard fix is the documented 'fuel pump rewire.'
Common Symptoms
- Engine cranks but fuel pump never hums
- Intermittent no-start, often after heat soak
- Stalling or dying while driving
- Lean stumble or fuel cut at wide-open throttle
- Fuel pressure/voltage at the pump drops under load
How to Fix
Test voltage at the pump and the fuel pump/MFI relay first; replace the relay if it fails continuity testing, and repair or supplement the corroded ground wire. The accepted long-term fix is the DSM fuel pump rewire: a relay-triggered, fused 12-gauge feed direct from the battery/alternator with a fresh chassis ground.
Sources for this issue (7)
- 2G - MFI/Fuel Pump Relay (relay failure, testing, 95 vs 96-99 part numbers)forum
- Resolved - 99 GST Fuel pump not turning on (confirms corroded floor-crossmember ground under driver's seat, fixed by new chassis ground)forum
- 2G AWD fuel pump rewire info - DSMTalkforum
- 2G Fuel Pump Rewire, Pictorial with Diagram (canonical community-standard fix writeup)forum
- Mitsubishi Eclipse Questions - Fuel pump not getting power to it - CarGurusforum
- 2g GS-T (FWD) & GSX (AWD) Fuel Pump Rewire Diagramforum
- 2G AWD Fuel Pump Rewire w/ STM kit (commercial rewire kit exists for this exact problem)forum
P0230 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 P0230 mean on a Mitsubishi?
P0230 stands for "Fuel Pump Primary Circuit Malfunction." P0230 means the engine computer detected a fault in the fuel pump primary circuit — the control side that switches the fuel pump (or its relay) on and off. The PCM energizes this circuit to run the electric fuel pump that delivers fuel to the engine; if it sees voltage that is too high, too low, or out of expected range, it sets this code. Because the pump may not run correctly, the engine can crank without starting, stall, lose power, or hesitate. This is a circuit/control fault rather than a direct measurement of fuel pressure. On Mitsubishi it is documented across 1 model: Eclipse.
What are the most common causes of P0230?
The most common causes of P0230 are: Faulty fuel pump relay, Damaged wiring or connectors in the fuel pump control circuit, Corroded or loose ground/power connection, Failed fuel pump or fuel pump driver module, Blown fuse or fusible link, Open or short in the primary control wiring, Faulty PCM driver output (rare). The specific cause varies by vehicle.
How much does it cost to fix P0230 on a Mitsubishi?
Published repair estimates on Mitsubishi range from $75 to $400 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0230 on a different make?
View P0230 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.