Fuel Pump Secondary Circuit High
The P0232 code means the vehicle's onboard diagnostic system has detected: Fuel Pump Secondary Circuit High. This is a critical severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- moderate
- Estimated cost
- $150 - $850 (parts and labor)
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What Are the Symptoms of P0232?
- Engine runs rough or misfires
- Strong fuel smell from exhaust or engine bay
- Check Engine Light illuminated
- Fuel pressure higher than specification
- Hard starting when engine is hot
What Causes P0232? (Most Likely First)
- Short to power in fuel pump circuit wiring Very High
- Fuel pump relay stuck closed (continuously powered) High
- Faulty fuel pump drawing excessive current High
- Damaged wiring harness near fuel tank Moderate
- PCM fuel pump driver circuit shorted Low
Can I Still Drive with P0232?
No — stop driving. P0232 is rated critical severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
Frequently Asked Questions
Can I drive with code P0232?
No. A high fuel pump circuit can mean the pump runs continuously or delivers excessive fuel pressure, which is a fire hazard. Have the vehicle inspected immediately.
Why is my fuel pump running with the key off?
This typically means the fuel pump relay is stuck in the closed position, continuously sending power to the pump. This is a fire risk and the relay should be removed or replaced immediately.
Can a short in the wiring cause P0232?
Yes. A wire that has chafed through its insulation and contacts a power source can bypass the relay and send continuous power to the fuel pump, triggering this code.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0232?
-
Measure fuel pump current draw -- readings above 10 amps indicate excessive draw or a short circuit
-
Check if the fuel pump continues to run with the key off -- indicates a stuck relay or short to power
-
Test fuel pump relay by removing it and checking if the pump stops -- a stuck relay will keep the pump running
-
Inspect fuel pump wiring harness along the frame rail and near the tank for chafing or bare wires
-
Replace the fuel pump relay first if stuck; replace the fuel pump if current draw is excessive
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P0232?
- 2004-2014 Ford F-150
- 2006-2016 Chevrolet Silverado
- 2007-2017 Toyota Tundra
- 2005-2015 Dodge Ram 1500
- 2008-2018 GMC Sierra
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