By iCarsoft Official Store Technical Team, Automotive Diagnostics Editors · Updated September 4, 2026 · OEM technical references checked
Quick Answer
The P064A code means fuel pump control module. It does not prove the control module has failed, the fuel pump is bad, or fuel pressure is universally low. Save the scan, identify the exact architecture, and test the physical and electrical paths before selecting a repair.
What Does the P064A Code Mean?
P064A is standardized as Fuel Pump Control Module. It names a monitored result, not a guaranteed failed part. The reporting module, suffix and companion faults determine the relevant test branch.
A fuel pump control module can receive a pressure or load request over a network and vary pump output through a dedicated power stage. Depending on the vehicle, the module, pump, pressure sensor, network and power distribution are separate service parts. P064A identifies the module category; the OEM descriptor and subcode determine the monitored failure.
Read each suffix as its exact monitor classification, not a universal physical direction. Confirm the designation, units, signal source and test state before comparing scan data with an external measurement.
Mazda bulletin 01-010/17 lists P064A as a fuel pump control module error and documents an application-specific PCM calibration condition on certain 2016–2017 CX-9 vehicles. GM diagnostic documentation uses Fuel Pump Control Module Performance. These references show why code wording and software eligibility must be confirmed by VIN.
Separate P064A from adjacent fault families
| Code | General description | Key distinction |
|---|---|---|
| P064A | Fuel pump control module | Module fault category; use the OEM descriptor and subcode. |
| P069E | Fuel pump control module requested MIL | Request from the pump module for another stored fault. |
| P0627 | Fuel pump A control circuit/open | Pump control-circuit branch rather than module performance. |
| P0230 | Fuel pump primary circuit | Primary relay/control circuit family on applicable designs. |
Record the complete P064A description. The suffix, reporting module and companion faults can change the diagnostic path. Current manufacturer evidence governs when the queue wording conflicts.
P064A Symptoms and Likely Causes
P064A symptoms depend on fault status and the fallback strategy. Record what the driver and modules reported. A symptom list is not a parts list.
Record rail-pressure request and module communication before repeated cranking.
Save low-pressure and high-pressure companion faults and operating load.
Stop for fuel odor, leakage, wiring heat or abnormal pump operation.
An intermittent module self-check can store before fuel delivery becomes noticeable.
Practical cause-checking order
- Accessible connection: Loose, wet, corroded or overheated fuel pump control module connector or terminals.
- Circuit or shared path: Weak power, ground, pump-output or network path that fails under load.
- Supporting system: Low-voltage history, incorrect pump installation, restricted supply or pressure-sensor evidence affecting commanded response.
- Named component: Fuel pump control module or pump assembly that fails the exact electrical and delivery tests.
- Controller or software: PCM or pump-module calibration/configuration issue after external circuits and fuel delivery pass.
Did P064A appear after recent battery, tank, pump, pressure sensor, module, software, collision or harness work? Recheck disturbed connectors, grounds, hoses, fluids, part numbers and setup steps for the fuel pump control module operation and commanded fuel delivery. Record battery and software history; a post-repair code does not prove the new part is defective.
How Serious Is P064A, and Can You Drive?
Arrange diagnosis promptly. When the warning is steady, operation remains normal and the owner's manual permits it, a short light-load trip to a repair facility may be reasonable. Avoid demanding use until the fuel pump control module operation and commanded fuel delivery is understood. P064A does not provide a universally safe distance.
Record temperature, load, speed, start state and recent service. Do not reproduce a severe symptom on public roads; another warning can make the situation more urgent.
Stop and arrange a tow if fuel leaks or strong vapor is present, the engine stalls in traffic, power is severely reduced, wiring or a module overheats, or pressure testing cannot be performed safely.
Fuel is flammable and some systems retain high pressure after shutdown. Ventilate the area, prevent ignition, depressurize by the service procedure and use only rated gauges and adapters.
How to Diagnose P064A in the Right Order
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Save the complete fault record
Scan before clearing. Save P064A wording, suffix, reporting module, status, freeze frame, companion codes, supply voltage and available data for the fuel pump control module operation and commanded fuel delivery. Record failure order, recent repairs and restart behavior for later comparison.
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Identify the VIN-specific monitor and architecture
Use the VIN, engine, transmission and equipment codes to obtain the current wiring diagram, connector views, monitor description and bulletins. A fuel pump control module can receive a pressure or load request over a network and vary pump output through a dedicated power stage. Depending on the vehicle, the module, pump, pressure sensor, network and power distribution are separate service parts. P064A identifies the module category; the OEM descriptor and subcode determine the monitored failure. Confirm software identifiers and service-action eligibility directly; a bulletin for one application does not establish coverage for another.
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Inspect the accessible physical path
Follow the safety procedure, then inspect connectors, locks, seals, terminals, clips and harness routing for the fuel pump control module operation and commanded fuel delivery. Look for heat, abrasion, fluid entry, corrosion, tension and unsuitable prior repairs. Check the supporting mechanical, air, exhaust, fluid or vacuum path named in the service information. Photograph evidence before correcting it.
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Prove circuits and physical conditions
Use the digital multimeter, loaded-circuit and current-measurement tools, manufacturer-approved fuel-pressure equipment and network diagnostic tools as the exact procedure requires. Prove feeds, grounds and references under the specified load, then test signal or control integrity at the correct states. Isolate components before resistance tests. Never bridge a controller pin to battery or ground, and do not substitute a continuity beep for a load, pressure or waveform test.
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Compare supported command and response
Save fuel pump module and PCM faults, communication state, commanded pump output, low-side pressure and available rail-pressure data. Compare command with measured current and pressure only under the specified fuel-system safety conditions. Compare scan evidence with the external measurement and companion faults. A command does not prove physical movement, pressure, current, temperature or torque. A missing PID or active test is a coverage limitation, not evidence that the vehicle component failed. Stop any test if operation becomes unsafe.
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Choose the supported repair and setup
Repair the failed path and correct the reason for damage. Confirm part application, required setup authorization and any relearn. Consider a controller only after its powers, grounds, inputs, outputs and service information pass.
Specifications are vehicle-specific. There is no universal voltage, resistance, current, pressure, waveform, timing, temperature, percentage, learned value or drive cycle for P064A. Test state, connector location and system design change what a valid value means. Use only specifications for the exact VIN and do not transfer the OEM example in this article to another application.
P064A Repairs and Typical Costs
The correct P064A repair follows the failed test. Wiring, a physical repair, a proven component, software and controller work are different outcomes. Do not replace an assembly from the generic code alone.
After installation, recheck connector seating, harness clearance, fluid or mechanical setup and every required learn. If an OEM bulletin appears relevant, document vehicle eligibility, installed calibration and prescribed action. The existence of the bulletin in the references does not promise warranty, free repair or a software cure for other vehicles.
| Possible path | Current US estimate |
|---|---|
| Restore module connector, power, ground, network or pump-output circuits | VIN-specific quote |
| Correct a proven fuel-delivery, pressure-sensor or pump-installation problem | VIN-specific quote |
| Replace the pump control module or pump only after its specified test fails | VIN-specific quote |
| Program or configure an eligible controller only with exact VIN coverage | VIN-specific quote |
There is no single national P064A repair price because these rows are alternative outcomes. Ask for an itemized estimate showing diagnostic time, parts, labor, fluids, service-information access and verification. Location, taxes, related damage and warranty eligibility change the total. Do not add the rows together or authorize an assembly without the supporting failed test.
Using iCarsoft CR Max P for P064A
On a supported vehicle, iCarsoft CR Max P can retrieve accessible module faults, save available freeze frame, display ECU-provided live data and create a diagnostic report. For P064A, preserve the original evidence and compare related modules before clearing an erasable record.
Preserve the fuel pump control module operation and commanded fuel delivery evidence
iCarsoft CR Max P
Review supported codes and relevant live data together. Confirm the exact VIN, controller access, PIDs and any requested active test with iCarsoft before purchase; generic product capabilities do not guarantee a P064A-specific function.
Check current CR Max P price and availabilityCheck CR Max P compatibility by VINThe official product page describes full-system diagnosis, available freeze frame/live data, reports, topology and supported bidirectional functions; every function remains vehicle, ECU and software dependent. Supported topology and coding availability varies by vehicle and ECU and requires VIN confirmation. Follow OEM prerequisites and stop for abnormal operation.
Know the measurement boundary. The scanner reports information supplied by the vehicle. It does not directly prove terminal tension, circuit load capacity, leakage, pressure, temperature, mechanical travel or internal condition in the fuel pump control module operation and commanded fuel delivery. It also cannot replace the digital multimeter, loaded-circuit and current-measurement tools, manufacturer-approved fuel-pressure equipment and network diagnostic tools when the OEM procedure requires them. Interpret commanded and reported values alongside measured evidence.
Verify the P064A Repair
After repair, verify connectors, harness clearance, setup and controller supply. Save post-repair findings, then clear only erasable records through the approved procedure. Battery disconnection is not a repair.
Run the manufacturer's applicable verification conditions in a safe workshop or route. Compare the original operating state with current data for the fuel pump control module operation and commanded fuel delivery, and check current and pending faults in related modules. One clean start or idle period does not prove that every conditional monitor has completed.
If P064A returns, compare its suffix, status, failure order and operating conditions with the saved baseline before replacing another part. Revisit the failed branch and inspect anything disturbed. Keep mechanical repair, monitor completion, readiness and local inspection eligibility as separate outcomes.
A permanent P064A can remain immediately after a successful repair. If the vehicle stores it as a permanent DTC, a scan tool or battery disconnect cannot erase it. Once current and pending faults are absent, the OBD system removes the permanent record only after the applicable monitor reruns and passes.
Related Fuel Pump Control Module Operation And Commanded Fuel Delivery Code Guides
P064A Frequently Asked Questions
Does P064A mean the named component is bad?
No. P064A describes fuel pump control module, not a confirmed part. It also does not prove the control module has failed, the fuel pump is bad, or fuel pressure is universally low. Test accessible wiring, supplies, grounds and supporting physical conditions, then follow the exact monitor tree. Replace a component only when its branch fails or an applicable OEM action specifically supports it.
What should I check first for P064A?
Save every module's codes and freeze frame before clearing. Confirm the full definition, suffix and VIN architecture. Then inspect recent battery, tank, pump, pressure sensor, module, software, collision or harness work, connectors and shared supplies. Those facts determine whether the next test needs the digital multimeter, loaded-circuit and current-measurement tools, manufacturer-approved fuel-pressure equipment and network diagnostic tools or a manufacturer-specific functional procedure.
Can I drive with the P064A code?
Only consider a short light-load trip when operation is normal and the owner's manual permits it. Stop if fuel leaks or strong vapor is present, the engine stalls in traffic, power is severely reduced, wiring or a module overheats, or pressure testing cannot be performed safely. The code number cannot establish a safe mileage allowance, and another warning can make the situation more urgent.
Why did P064A return after a part was replaced?
The original circuit or supporting-system fault may remain, the part or setup may be wrong, or the first diagnosis may have confused a monitored result with a failed component. Compare the new failure conditions with the saved record and recheck every disturbed connection before buying another part.
How much does a P064A repair cost?
A VIN-specific estimate is required because diagnosis may lead to wiring, a supporting physical repair, a verified component, software or a controller. Ask which failed test supports the quote and whether diagnosis, taxes, setup and post-repair verification are included.
Can CR Max P diagnose and clear P064A?
On a supported vehicle, CR Max P can organize available faults, freeze frame, live data and reports, and can clear erasable records after repair. Confirm exact ECU coverage. It cannot force-clear a permanent DTC or replace physical measurements for the fuel pump control module operation and commanded fuel delivery.
The iCarsoft Official Store Technical Team maintains the store's fault-code library. This guide organizes published manufacturer evidence and verified product information; it does not document a hands-on test of a particular vehicle or claim an individual engineer's review.
Technical and cost references
- Mazda TSB 01-010/17, 2017. Lists P064A Fuel Pump Control Module Error and documents a calibration-specific repair on covered CX-9 vehicles.
- General Motors 2008 Hybrid Fuel System Control Module diagnostics. Documents a P064A fuel-pump-control-module performance implementation involving driver over-temperature, illustrating OEM-specific monitor detail.
- California Bureau of Automotive Repair — On-Board Diagnostic Test Reference. Permanent DTCs are removed by the vehicle after applicable verification, not by a scan-tool erase command.
Product information: Official iCarsoft CR Max P page.
Editorial note: General diagnostic education, not a substitute for the owner's manual, current VIN-specific service information or professional inspection. Test limits, procedures, coverage and costs vary. Related articles provide context; apply only the specifications and repair procedures that match the vehicle. No universal failure rate, repair price or outcome is implied.
