- Damaged reductant pump
- Damaged reductant injector
- Damaged reductant purge valve
- Damaged reductant pressure line
- Damaged reductant pressure sensor
- Engine Light ON (or Service Engine Soon Warning Light)
P20e8 DescriptionThe Powertrain Control Module (PCM) monitors reductant pressure as the system primes for injection. The Aftertreatment DEF pump has internal diagnostics which evaluate whether the DEF pump is able to meet its demand. If the pump reports insufficient performance for more than a threshold time then the P20E8 code is set.
P20E8 Information for specific makes
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