P0231 on Toyota
Fuel Pump Secondary Circuit - Low
P0231 on Toyota vehicles indicates fuel pump secondary circuit - low. Au7o has documented this code across 3 Toyota models — most commonly on Camry, Corolla, RAV4. This code indicates the engine computer detected a low-voltage condition in the fuel pump's secondary (driver/output) control circuit. Many vehicles control the fuel pump through a relay or a dedicated driver module, and the computer monitors the voltage on that circuit to confirm the pump is being powered correctly. When the feedback voltage stays lower than expected, P0231 sets. Because the fuel pump supplies pressurized fuel to the injectors, this fault can cause hard starting, stalling, or no-start conditions.
Common Causes of P0231
- •Faulty fuel pump relay
- •Corroded or loose connector at the pump or relay
- •Damaged or shorted wiring in the pump power circuit
- •Poor ground for the fuel pump circuit
- •Failing fuel pump drawing abnormal current
- •Faulty fuel pump driver module
- •PCM/ECM internal driver fault (rare)
P0231 on Toyota by Model
Toyota Camry(1 issue)
- Low-Pressure Fuel Pump Failure (Recall)2018-2021
Toyota issued a recall for the low-pressure fuel pump which can fail and cause the engine to stall or not start. The fuel pump impeller may deform, leading to reduced fuel delivery. This affects many Toyota models.
Toyota Corolla(1 issue)
- Fuel Pump Impeller Deformation2018-2020
Certain 2018-2020 Corollas have a low-pressure fuel pump with an impeller that can deform due to excessive fuel absorption. This can cause reduced fuel delivery, engine hesitation, and in worst cases, engine stalling while driving - creating a significant crash risk. This is a safety recall affecting multiple Toyota models.
Toyota RAV4(1 issue)
- Low-Pressure Fuel Pump Failure / Engine Stall2019-2021
The low-pressure fuel pump inside the fuel tank may fail, causing the engine to stall while driving. This increases the risk of a crash, especially at highway speeds. Part of a massive Toyota recall affecting multiple models.
Looking for P0231 on a different make?
View P0231 across all makes →Frequently Asked Questions
What does P0231 mean on Toyota?▼
P0231 stands for "Fuel Pump Secondary Circuit - Low." This code indicates the engine computer detected a low-voltage condition in the fuel pump's secondary (driver/output) control circuit. Many vehicles control the fuel pump through a relay or a dedicated driver module, and the computer monitors the voltage on that circuit to confirm the pump is being powered correctly. When the feedback voltage stays lower than expected, P0231 sets. Because the fuel pump supplies pressurized fuel to the injectors, this fault can cause hard starting, stalling, or no-start conditions. On Toyota specifically, this code is documented across 3 models.
What causes P0231 on Toyota vehicles?▼
Common causes on Toyota: Faulty fuel pump relay, Corroded or loose connector at the pump or relay, Damaged or shorted wiring in the pump power circuit, Poor ground for the fuel pump circuit, Failing fuel pump drawing abnormal current. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0231 on a Toyota?▼
Repair costs vary widely depending on the root cause and specific Toyota model.
Which Toyota models have P0231 documented?▼
Au7o has documented P0231 on 3 Toyota models: Camry, Corolla, RAV4.