What it means
Control voltage of the fuel cooler pump is above the expected range — short to power or open ground. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
At a glance
- Usually lights the check-engine light
How it works
The fuel cooler pump circulates fuel through a cooler on vehicles equipped with that system. The control module sets P008E when the pump control circuit voltage is higher than expected, which can point to a control wire shorted to power, a poor ground, or a connection fault.
Common causes
Most likely first.
- Wiring shorted to battery
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Check engine light on
- Fuel system warning light, if equipped
- Reduced engine performance in hot conditions
How to diagnose it
- Save freeze-frame data and note whether the fuel-system warning or reduced performance occurred in hot conditions.
- Inspect the pump harness for chafing against a powered wire, pinching, water ingress, and loose or pushed-back connector terminals.
- Check the pump connector and ground path for corrosion or a poor connection that could leave the control circuit voltage high.
- Using the wiring diagram, test for a short to battery voltage and verify circuit continuity and ground integrity.
- Compare circuit readings with the manufacturer's specification and check module control only after the harness and pump circuit pass.
Common fixes
- Repair a control wire shorted to battery power or another powered circuit.
- Repair a pinched harness and secure it away from the power source.
- Clean or replace corroded terminals and restore connector sealing.
- Repair an open or high-resistance ground connection.
- Replace the pump or control component only if circuit testing confirms the fault lies there.
Can I keep driving?
Drive gently and avoid prolonged heavy loads in hot weather because the fuel cooler pump may not be controlled correctly. If performance falls or a fuel-system warning appears, stop and have the fault checked before continuing.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.