DTC Detection Logic
WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
The Engine Control Module (ECM) has detected the heater input power source voltage to the DEF supply pump assembly is in excess of an allowable value.
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DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
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P20B7-00 |
DEF HTR TEST TIME DEF HTR TEST TIMER DEF HTR TEST COUNTS Def tank heater test status |
Diagnosis condition |
This diagnostic runs when the DEF supply pump assembly heater is commanded ON. |
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Signal (terminal) |
DEF tank heater signal. |
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Threshold |
ECM detects the DEF supply pump assembly heater temperature is rising when the heater was commanded OFF. |
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Diagnosis delay time |
- |
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