P0230 on Lexus
Fuel Pump Primary Circuit Malfunction
P0230 on Lexus vehicles indicates fuel pump primary circuit malfunction. Au7o has documented this code across 1 Lexus model — most commonly on IS. 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.
Common Causes of P0230
- •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)
P0230 on Lexus by Model
Lexus IS(1 issue)
- Fuel Pump Impeller Failure (Recall)2018-2020
The low-pressure fuel pump impeller can deform due to excessive fuel absorption, causing the fuel pump to become inoperative. This results in engine stalling while driving or inability to start, creating a serious safety hazard. Toyota/Lexus issued a massive recall (20V-863) affecting over 1.8 million vehicles across multiple models.
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View P0230 across all makes →Frequently Asked Questions
What does P0230 mean on Lexus?▼
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 Lexus specifically, this code is documented across 1 model.
What causes P0230 on Lexus vehicles?▼
Common causes on Lexus: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0230 on a Lexus?▼
Repair costs vary widely depending on the root cause and specific Lexus model.
Which Lexus models have P0230 documented?▼
Au7o has documented P0230 on 1 Lexus model: IS.