Code result
P2605
Intake Air Heater B Circuit / Open
Moderate severity
What it means
The controller cannot drive the secondary intake air heater (heater grid B) used on diesel engines for cold-start support. The grid stays cold so cold-start emissions and white smoke increase.
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
Open heater grid element
highOne of the most commonly reported causes for this code — check this first.
Failed heater relay or open coil
mediumA plausible cause — test and verify before replacing parts.
Related help
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