P0230
High SeverityFuel Pump Primary Circuit
Fuel System
P0230 — Instant Answer
Fuel Pump Primary Circuit
Severity: HIGH SEVERITY
Meaning: The fuel pump relay or primary circuit has a fault. The fuel pump may not be getting power.
Safe to drive? NO if CEL is flashing. YES with caution if solid, but repair this week.
Estimated repair cost: $5 - $30
Most common causes:
- 1. Failed fuel pump relay (35-45% of cases)
- 2. Blown fuel pump fuse (35-45% of cases)
- 3. Bad wiring to fuel pump (10-25% of cases)
- 4. Failed fuel pump (10-25% of cases)
Symptoms
- ⚠️No start or hard start
- ⚠️Engine stalls
- ⚠️Loss of power
- ⚠️No fuel pump hum when turning key
Related Symptoms
Common Causes
How to Diagnose P0230
- 1Check fuel pump fuse
- 2Check fuel pump relay (swap with identical relay)
- 3Listen for fuel pump prime when key turns to ON
- 4Check for power at fuel pump connector
OEM Procedures for P0230
P0230 affects the Fuel Pump. Found 188 OEM service manual procedures.
Component Fuel Pumps - Fuel Pump Diaphragm Installation
Component Fuel Pumps - Fuel Pump Diaphragm Installation
Component Fuel Pumps - Fuel Pump Diaphragm Installation
Component Fuel Pumps - Fuel Pump Diaphragm Installation
Component Fuel Pumps - Fuel Pump Diaphragm Installation
Component Fuel Pumps - Fuel Pump Diaphragm Installation
Component Fuel Pumps - Fuel Pump Diaphragm Installation
Component Fuel Pumps - Fuel Pump Diaphragm Installation
Showing 8 of 188 procedures
OEM Diagnostic Flowchart
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Parts & Tools for This Job
Common parts shoppers buy for P0230 Fuel Pump Primary Circuit.
Oxygen Sensor
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Spark Plugs
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Ignition Coils
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Mass Air Flow Sensor
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Fuel Injectors
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Engine Oil
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OBD2 scanner
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Check SpecificationsBattery tester
Check cranking and charging health before replacing expensive parts.
A weak battery can mimic alternator or starter problems.
Check SpecificationsMultimeter kit
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A meter is the cheapest way to rule out a bad circuit fast.
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0230.
OEM Manual Evidence
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A L L Diagnostic Trouble Codes ( DTC ) — 2013 Cadillac CTS Sedan RWD V8-6.2L SC Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowle...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Cadillac CTS Wagon RWD V8-6.2L SC Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowle...
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Related Symptoms
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Open the exact vehicle hub for a repair workflow commonly associated with P0230.
Open the exact vehicle hub for a repair workflow commonly associated with P0230.
Open the exact vehicle hub for wiring diagnosis commonly associated with P0230.
Open the exact vehicle hub for wiring diagnosis commonly associated with P0230.
Open the exact vehicle hub for wiring diagnosis commonly associated with P0230.
Exact Repair Workflows
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Open the exact repair flow most commonly associated with P0230 on this vehicle.
Open the exact repair flow most commonly associated with P0230 on this vehicle.
Open the exact repair flow most commonly associated with P0230 on this vehicle.
Open the exact repair flow most commonly associated with P0230 on this vehicle.
Open the exact repair flow most commonly associated with P0230 on this vehicle.
Wiring Diagram Paths
Browse →Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0230.
Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0230.
Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0230.
Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0230.
Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0230.
Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0230.
Related Codes
The fuel pump feedback circuit is reading low. The ECM is not seeing proper fuel pump operation.
Fuel pump circuit voltage is higher than expected.
Fuel rail pressure sensor reads too low. Could be a sensor fault or actually low fuel pressure.
Frequently Asked Questions
- How do I know if the fuel pump is getting power?
- Turn the key to ON (not start) and listen for a 2-second hum from the rear. No hum means no power to the pump.
- Where is the fuel pump relay?
- Usually in the underhood fuse/relay box. Check the lid diagram for the fuel pump relay location.
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-10-29