What it means
The cylinder 6 alternative-fuel injector control circuit has a voltage below the expected range. This indicates an electrical circuit fault, not necessarily an injector flow problem or short to ground.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The control module switches the alternative-fuel injector for cylinder 6 through a dedicated electrical circuit. P22EE sets when the circuit voltage is lower than expected; this indicates an electrical problem, but does not by itself prove a short to ground or an injector fuel-flow fault.
Common causes
Most likely first.
- Short to ground
- 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
- Record freeze-frame data and check live misfire data for cylinder 6 to relate the low-voltage fault to engine operation.
- Inspect the cylinder 6 alternative-fuel injector connector and harness for corrosion, loose terminals, or insulation chafed through against the vehicle body.
- Compare circuit readings with the manufacturer's diagnostic information to verify the low condition.
- With power isolated as the manufacturer specifies, check the circuit for an unintended ground and inspect connector contact quality.
- If the harness and connections pass, test the cylinder 6 injector and control-module driver using the manufacturer's procedures.
Common fixes
- Clean or repair corroded terminals at the cylinder 6 injector connector.
- Repair chafed insulation or a control wire shorting to ground in the cylinder 6 circuit.
- Replace the cylinder 6 alternative-fuel injector if electrical tests show it is faulty.
- Repair or replace the control module only if its cylinder 6 driver is confirmed faulty.
Can I keep driving?
If the engine is running roughly, avoid continued driving and heavy acceleration; if it runs normally, drive only as needed for prompt diagnosis. A cylinder 6 misfire can increase emissions and fuel use and may damage the exhaust catalyst.
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.