P0231: Fuel Pump Secondary Circuit - Low
48 vehicles · 13 makes
P0231 is an OBD-II diagnostic trouble code meaning “Fuel Pump Secondary Circuit - Low.” The fuel pump secondary circuit voltage is lower than expected. Indicates the fuel pump is drawing too little current. This code appears across 48 vehicle models from 13 manufacturers.
Common Causes
Diagnostic Tools
To diagnose P0231, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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Vehicles Affected (48)
Fuel Pump Module Failure
Fuel Pump Module Failure Causing Engine Stall
In-Tank Fuel Pump Failure
In-Tank Fuel Pump Failure
In-Tank Fuel Pump Failure
TIPM Electrical Failures
Fuel Pump Relay Failure (TIPM-Related)
TIPM (Totally Integrated Power Module) Failure
TIPM (Totally Integrated Power Module) Failure
TIPM Electrical Module Failure
TIPM (Totally Integrated Power Module) Issues
TIPM Electrical System Failure
TIPM (Totally Integrated Power Module) Failure
Fuel Pump/Relay Failure (TIPM-Related)
TIPM Electrical Module Failure
TIPM Stalling and No-Start
Fuel Pump Module Failure and Hard Start / Stalling
In-Tank Fuel Pump Premature Failure
Fuel Pump Module Failure Causing No-Start or Stalling
In-Tank Fuel Pump Failure
In-Tank Fuel Pump Failure
Fuel Pump Module Failure Leading to No-Start or Intermittent Stalling
Fuel Pump Failure in Large Tank
Denso Fuel Pump Failure Recall
Denso Fuel Pump Impeller Failure - Safety Recall NHTSA 20V-374
Denso Fuel Pump Recall - NHTSA 20V-374 and 23V-111
Fuel Pump Impeller Failure Causing Stalling
Fuel Pump Impeller Failure Causing Stalling and No-Start
Denso Fuel Pump Failure
Fuel Pump Failure Recall (NHTSA 23V-858)
Fuel Pump Failure
Fuel Pump Failure (NHTSA Recall)
Fuel Pump Failure (Multiple Recalls - NHTSA 21V-215, 23V-858)
TIPM (Fuse Box) Failure
TIPM (Totally Integrated Power Module) Failure
TIPM Fuel Pump Relay Failure
Engine Stalling / Loss of Power While Driving
Sudden Power Loss / Engine Stalling While Driving
Low-Pressure Fuel Pump Failure / Engine Stall
Low-Pressure Fuel Pump Failure (Recall)
Low-Pressure Fuel Pump Failure (Recall)
Fuel Pump Impeller Deformation
FAQ
What does P0231 mean?
P0231 stands for "Fuel Pump Secondary Circuit - Low." The fuel pump secondary circuit voltage is lower than expected. Indicates the fuel pump is drawing too little current.
What are the most common causes of P0231?
The most common causes of P0231 are: Failing fuel pump, High resistance in fuel pump wiring, Corroded fuel pump connector, Faulty fuel pump relay, Bad ground. The specific cause varies by vehicle.
How much does it cost to fix P0231?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0231?
Au7o has documented P0231 across 48 vehicle models from 13 manufacturers: BMW, Chevrolet, Chrysler, Dodge, GMC, Honda, Jeep, Mazda, Nissan, RAM, Subaru, Toyota, Volvo.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.