What it means
The supply voltage feeding injector group E has dropped below the lower limit. The injectors in this group lose drive voltage and may stop firing, so the cylinders they serve run lean or cut out. Causes: a blown fuse, a failed injector supply relay, a voltage drop in the supply harness, or a poor ground or connector on the group-E supply.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
Injector group E shares a supply-voltage circuit that powers the injectors in that group. The control module sets this code when the group E feed falls below its lower voltage limit, which can interrupt injection and cause the served cylinders to run poorly or cut out.
Common causes
Most likely first.
- Fuse, relay, or wiring fault on supply
- Connector pins corroded - high contact resistance
- Harness chafing through insulation
Symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
How to diagnose it
- Save freeze-frame data and review misfire counts and live supply-voltage data to see when the group E feed drops and which cylinders are affected.
- Inspect the group E supply wiring and connectors for corrosion, loose terminals, chafing, or heat damage that could cause voltage loss.
- Check the applicable fuse and supply relay, if fitted, for a poor connection or failure, and verify the feed using the vehicle's wiring information.
- Measure voltage at the group E feed under the conditions specified by the manufacturer, then perform a voltage-drop check across suspect connections and grounds.
- If the supply remains low despite sound connections and protection devices, trace the harness and verify the control module connections before replacing components.
Common fixes
- Clean and secure a corroded or loose group E connector or ground.
- Replace a failed fuse or relay after checking for an underlying cause.
- Repair chafed or high-resistance wiring in the group E supply circuit.
- Repair a module connection only after confirming the harness and supply components meet the manufacturer's specification.
Can I keep driving?
Limit driving if the engine is misfiring or running roughly, and avoid towing or heavy acceleration. Continued misfire can damage the catalytic converter, while a sudden cutout can reduce power in traffic.
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.