U3017Control Module Timer/Clock Performance
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- 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.
- What you may notice
- 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
- Likely causes
- LikelyModule software that flags timing differences too readily; fixed by reprogramming
- PossibleTime or key-off information from another module arriving late or implausible at start-up
- PossibleDischarged 12 V battery after a long standstill
- RareReal defect of the module's clock circuit
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.