Powertrain, generic (extended)

P208E Reductant Injection Valve Stuck Closed (Bank 1 Unit 1)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P208E says the first DEF dosing valve does not open although it is energised correctly. Valve movement shows in the coil current: when the armature lifts, the trace kinks. Ford's 2023 diesels judge every stroke and need 50 failures; the test pauses while P2047 to P2049 report a circuit fault. Volkswagen's 2014 Touareg TDI counts more than 50 missing signal peaks, Deutz EMR5 files it as P208E-73, raised by its BIP check that looks for the valve opening. Usually urea crystals block the nozzle. Under Ford SSM 48539 the dosing test is repeated up to three times against a 40 to 50 mL target before the valve, never the pump, is replaced; Mack and Volvo describe intermittent clogging checked by timed flow tests; GM PIP5662 (low cab forward) replaces valve and pump filter. NOx rises and inducement follows.

Likely causes

Urea crystals blocking the dosing valve nozzle
Valve needle seized from deposits or heat
Contaminated fluid or debris from a dirty pump filter

Symptoms

  • MIL and DEF dosing warning
  • DEF consumption drops noticeably
  • Derate or countdown to no-restart

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–900
Time0.5–3 h

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

Parts involved

reductant injection valve

Related codes

P208FP2047P2048P2049P202DP218F

References: fordservicecontent.com, static.nhtsa.gov, serdia.deutz.com, static.nhtsa.gov.