Powertrain, generic (extended)

P2B2F Fan 1 Performance/Stuck Off

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

Unlike the circuit codes P0480, P0691 and P0692, P2B2F judges the result: radiator fan 1 is commanded on but does not deliver, up to not turning at all. Detection uses fan speed feedback from a PWM or LIN fan module, or the missing temperature drop when the fan should be cooling. FCA lists P2B2F-00 with the MIL for the 2017–2018 Alfa Romeo Giulia and 2018 Stelvio with the 2.0 L turbo four (EC2) in bulletins 18-097-19 and 18-026-20, among other codes fixed by a PCM software update; no thresholds are published. CARB requires output components such as fans to be checked for proper functional response. Beyond software, a seized motor, debris in the blades or a failed fan module are the usual finds. Overheating in traffic and weak A/C at idle follow. The stuck-on case is P2B30.

Likely causes

Fan 1 motor worn or seized, or blades blocked by debris

Fan control module or relay not switching the motor

Engine software judging the fan wrongly (FCA 2.0 L)

Poor power feed or ground at the fan

Symptoms

MIL
Rising coolant temperature in slow traffic
Weak air conditioning at standstill

Repair estimate

DifficultyMediumDIY possible

Parts and labour€20–600

Time0.3–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

cooling fan 1fan relay 1ecm

References: static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.