Vehicles with a second fuel pump give it its own driver module, and P26EA means that module B has reported an internal fault of its own. Ford documents the code in its gasoline OBD summary for 2020 to 2023 and again in 2024 as an internal error reported by the driver module of pump B. Module B reports its state to the PCM as a duty cycle on a fuel pump monitor wire: about 20 % flags invalid control data, 30 % plus or minus 4 % flags the internal error, while 0 or 100 % means no feedback at all (U016C). The check runs continuously at 11 to 16 V battery voltage and needs 2 to 5 seconds. Roush CleanTech's propane systems for Ford E- and F-Series route the same signal through a relay module to the PCM; there the code is non-MIL on the E-450 but MIL on F-650 and F-53. Fuel delivery from pump B may be reduced.
Medium severity. Can I keep driving?Avoid long trips and hard acceleration. If you smell fuel or the car stalls, do not continue.
Symptoms
- Warning light on, depending on the vehicle calibration
- Hesitation or power loss at high load
- Hard starting or stalling if the second pump is needed
Most likely causes
- Internal failure of fuel pump driver module B
- Open or corroded fuel pump monitor wire between module B and the PCM or relay module
- Poor power or ground at module B
- Worn or seized fuel pump B overloading the module
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It affects emissions.
What each character of P26EA means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 6: Control modules and outputs
- EA: Specific fault in that system
Frequently asked questions
Can I keep driving with code P26EA?
Avoid long trips and hard acceleration. If you smell fuel or the car stalls, do not continue.
What causes code P26EA?
The most common causes are: internal failure of fuel pump driver module B; open or corroded fuel pump monitor wire between module B and the PCM or relay module; poor power or ground at module B.
Related codes
- P2632Fuel Pump B Control Circuit/Open
- P027BFuel Pump Module B Control Circuit Range/Performance
- P025AFuel Pump Module A Control Circuit/Open
- P064AFuel Pump Control Module A
- U016CLost Communication With Fuel Pump Control Module B
Sources
- fordservicecontent.com: OBD Operations Summary Gasoline 2020 2023
- fordservicecontent.com: OBDSM2400OUTPUT 16Jul2024 WSM final V2 MCS7001
- roushcleantech.com: Roush CleanTech Diagnostics Manual DA 8.5.18
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.