Powertrain, generic (extended)

P241E Reductant Heater Coolant Control Valve Stuck Closed

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

Many SCR systems thaw frozen DEF with engine coolant routed through the tank or supply module; an electrically switched valve lets coolant in. P241E means that valve stays shut although the controller has opened it, so the expected warm-up does not appear. Deutz assigns P241E-00 in its EMR L1 list to the heating valve of the DEF pump and finds it through the defrost check; a closed tank heating valve gets its own code there (P1283). Unlike the circuit codes P20B1 to P20B4, wiring may be intact here; the valve or its coolant path is blocked. Hino bulletin TT-16-014 shows how a cutoff valve can be function-tested. In frost the SCR stays unavailable, NOx rises and an inducement can follow.

Likely causes

Valve seized or diaphragm stuck in the closed position
Kinked, blocked or air-locked coolant hoses to the DEF heater
Low coolant level or weak circulation

Symptoms

  • SCR or DEF warning in cold weather, DEF does not thaw
  • Higher NOx, possibly further SCR codes
  • Countdown to restart or power limitation if left unrepaired

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€150–700
Time1–3 h

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

Parts involved

reductant coolant control valve

Related codes

P20B1P20B2P20B3P20B4P20B9

References: serdia.deutz.com, static.nhtsa.gov, boschaftermarket.com, law.cornell.edu.