Code result
P23FD
Cylinder 12 Injector B Air-Fuel Ratio Imbalance
Moderate severity
What it means
On dual-injector systems (typical for some heavy-duty diesels and some petrol/gas bi-fuel applications) the secondary injector B at cylinder 12 cannot keep its mixture in balance with the rest of the bank.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Injector B for cylinder 12 has drifted in flow rate
highOne of the most commonly reported causes for this code — check this first.
Related help
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