Network, generic (extended)

U3017 Control Module Timer/Clock Performance

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modeNo

U3017 means a module distrusts its own time base: the clock or timer it counts with disagrees with what it expects, often time received from another unit over the network. In practice it is mostly a software matter. Ram's 6.7 L Cummins trucks list U3017 in a long series of ECM reflash bulletins from 2014 on (e.g. 18-002-14, 18-019-20) to stop the MIL when nothing is defective, and Ram's 2019 eTorque battery module got new software for it (08-030-24). Nissan's NTB17-066 reprograms the Titan XD 5.0 L diesel ECM for a lit MIL with U3017. Volvo and Mack trucks of 2016–2017 set it intermittently, about 18 min after start; the advice is not to swap the ECU or cluster but to update software or wait 5 s with key on before cranking. Audi traces U301700 in the A3's 48 V battery module to a flat 12 V battery after long standstill.

Likely causes

Module software that flags timing differences too readily; fixed by reprogramming

Time or key-off information from another module arriving late or implausible at start-up

Discharged 12 V battery after a long standstill

Real defect of the module's clock circuit

Symptoms

MIL on without any drivability complaint
Code appears some minutes after start and later goes inactive
Reappears after clearing until the module software is updated

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€0–300

Time0.2–1.5 h

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

Parts involved

control modulemodule oscillator

Related codes

P2610 P262B U3001 U3012 U3000

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.