P0231 on Toyota
Fuel Pump Secondary Circuit - Low
P0231 on Toyota vehicles indicates fuel pump secondary circuit - low. Au7o has documented this code across 2 Toyota models — most commonly on Camry, Corolla. 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)
- 2018-2020 Camry Low-Pressure Fuel Pump May Fail - Recalls 20V012/25V0282018-2020
Toyota's Denso low-pressure fuel-pump recall history includes certain 2018-2020 Camry vehicles under original NHTSA recall 20V012 / Toyota 20TA02 and a small omitted population of 2018 Camrys under 25V028 / 25TA01. An affected pump can stop operating, causing warning messages, rough running, engine stall and inability to restart; a stall at higher speed increases crash risk. Applicability depends on the VIN and specific pump population, not model year alone. The prior 2021 scope and recall numbers 20V750/21V251 were incorrect.
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.
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 2 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 2 Toyota models: Camry, Corolla.