Code result
P25BA
Regeneration Control Switch Circuit/Open
Moderate severity
What it means
The DPF/SCR forced-regeneration request switch — used on commercial vehicles to let the operator force a parked regeneration when the automatic regen has been postponed too often — is open. The ECM cannot honour an operator request for forced regen.
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 switch wire
highOne of the most commonly reported causes for this code — check this first.
Pin pushed back out of connector body
lowLess common, but worth ruling out after the more likely causes.
Cracked solder joint inside the module or sensor
lowLess common, but worth ruling out after the more likely causes.
Related help
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