P0231 on RAM
Fuel Pump Secondary Circuit - Low
P0231 on RAM vehicles indicates fuel pump secondary circuit - low. Au7o has documented this code across 1 RAM model — most commonly on 1500. 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. Typical repair costs on RAM range from $50 to $1,200, depending on the specific model and root cause.
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 RAM by Model
RAM 1500(1 issue)
- TIPM (Totally Integrated Power Module) Failure2009-2016
The TIPM controls most electrical functions and commonly fails, causing erratic behavior. The fuel pump relay inside the TIPM is particularly prone to failure, resulting in no-start conditions. Horn honking randomly, headlights flickering, and wipers activating on their own are common symptoms.
Looking for P0231 on a different make?
View P0231 across all makes →Frequently Asked Questions
What does P0231 mean on RAM?▼
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 RAM specifically, this code is documented across 1 model.
What causes P0231 on RAM vehicles?▼
Common causes on RAM: 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 RAM?▼
Repair costs on RAM range from $50 to $1,200, depending on the specific model and root cause.
Which RAM models have P0231 documented?▼
Au7o has documented P0231 on 1 RAM model: 1500.