Espar / Eberspacher Airtronic 2 (S2 D2L / M2 D4L) error code P000302
Too many watchdog resets (legacy 090)
What to check, and in what order, is in the app. The flow Diesel Forced-Air Heater — entry diagnostic (Espar / Webasto / Autoterm / Chinese) walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Eberspacher/Espar Airtronic 2 (S2 D2L / M2 D4L) fault-code manualEberspacher
- Eberspaecher Airtronic 2 Repair Instructions - S2 D2L Fault Codes and Diagnosis, doc 25.2720.95.2682.0D EN (02.2020)
Related codes
- P000261Universal output - Short circuit
- P000262Universal output - Short circuit to battery (+) or transistor error
- P000300Overheating detection - metering-pump hardware or cutout circuit…
- P000301Watchdog reset (legacy 090)
- P000303Operating lockout - too frequent output-stage errors (legacy 099)
- P000304Too many resets (loose contact) (legacy 091)
- P000305Control box not calibrated (legacy 095)
- P000306Second cutout circuit is defective (legacy 098)