SPN 598
CAUTION
Clutch switch
The truck's control module (ECU) reports a fault on: Clutch switch.
SPN 598 means a truck control module (ECU) flagged a fault on clutch switch, part of the Brakes / ABS system on heavy-duty diesel trucks. DERATE rates it CAUTION: you can keep driving carefully, but get it checked soon. Part usually replaced: Clutch pedal switch, $25–$140 (aftermarket to dealer) plus 0.3–1 h labor.
Brakes / ABS
Can I keep driving?
Yes, carefully. It does not usually cut power, but get it checked soon.
Part usually replaced
Clutch pedal switch
$25–$140 (aftermarket to dealer)
Labor: 0.3–1 h
USD, part only. Labor is billed at the shop's hourly rate.
Data: DERATE verified base, updated October 2026
Related codes
Read it off your own dash
Take one photo and DERATE tells you whether you can keep driving.
Ask DERATE
DERATE assists. It does not replace inspection by a qualified technician.