P0232 on Mazda: How to Diagnose & Fix
Fuel Pump Secondary Circuit - High
2 Mazda models · 2 documented issues · 2 critical
P0232 on Mazda by model: symptoms, diagnosis and fix
Low-pressure fuel pump impellers can deform, causing pump failure and engine stalling without warning. Part of a Denso low-pressure fuel pump defect that led to recalls by multiple manufacturers.
Common Symptoms
- Engine no-start condition
- Vehicle stalling at low speeds
- Sudden engine stall at highway speeds (rare but dangerous)
- Loss of power while driving
How to Fix
Dealer replaces fuel pump free of charge under recall. Contact Mazda dealer with VIN to check recall status.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Owner tips & cautions
- TipCheck recall status immediately at Mazda dealer
- TipSchedule repair ASAP - safety risk
- TipKeep fuel tank above 1/2 to reduce pump stress until fixed
- TipDocument any stalling incidents for dealer
Sources for this issue (2)
The CX-90 has been subject to multiple recalls for engine stalling and loss of drive power. Under Recall 7024J (NHTSA 24V815), improper software in the powertrain control module (PCM) and engine control modules (ECM) can illuminate malfunction indicator lights and activate a fail-safe mode that limits drive power; related campaigns cover engine no-restart after i-stop (24V816), PHEV loss of power in EV mode (24V817) and fuel-gauge-related running out of fuel and stalling (25V568). Engine stalling while driving presents a serious safety risk.
Common Symptoms
- Engine stalls unexpectedly while driving
- Loss of power followed by engine shutdown
- Check engine light and multiple warning indicators
- Engine fails to restart immediately after stalling
- Reduced power mode / limp mode activation
How to Fix
Take vehicle to Mazda dealer for recall service. Recall 24V815 involves PCM and ECM reprogramming with improved software (resolving DTC P061B); no fuel pump or turbocharger hardware is replaced. Service is free under recall. Check NHTSA recall lookup with VIN to verify applicability.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Owner tips & cautions
- TipCheck NHTSA.gov recall lookup with your VIN - multiple recalls may apply
- TipSchedule dealer appointment promptly - engine stalling is a safety issue
- TipAll recall repairs are free of charge at any Mazda dealer
- TipIf stalling occurs before recall service, pull to safe location and call roadside assistance (800-222-5500)
Sources for this issue (3)
P0232 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0232 mean on a Mazda?
P0232 stands for "Fuel Pump Secondary Circuit - High." This code means the engine computer has detected a high voltage signal in the fuel pump secondary (control) circuit, indicating the circuit that drives or monitors the fuel pump relay is reading higher than it should. The computer controls fuel pump power delivery through a relay and/or driver module, and a high reading suggests a short to voltage, a stuck relay, or a wiring fault in that control circuit. Depending on the fault, it can cause hard starting, stalling, or a no-start because fuel delivery is disrupted. The problem is typically electrical, in the relay, driver, or wiring, rather than the pump motor itself. On Mazda it is documented across 2 models: CX-5, CX-90.
What are the most common causes of P0232?
The most common causes of P0232 are: Faulty fuel pump relay (stuck or shorted), Short to voltage in the fuel pump control wiring, Failed fuel pump driver module, Corroded or damaged connectors in the circuit, Faulty fuel pump (internal short), Wiring chafed against the body or harness short, Faulty PCM/ECM (rare). The specific cause varies by vehicle.
How much does it cost to fix P0232 on a Mazda?
Repair costs vary widely with the root cause and Mazda model; each issue on this page carries its own estimate where one is published.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.