P0070low severityPowertrain
Ambient Air Temperature Sensor Circuit
on 2025 Mercedes-Benz EQB 300 4MATIC Dual Motor AWD · AWD
What this code means
The PCM detected a malfunction in the ambient air temperature sensor circuit.
Symptoms
- Check Engine Light
- Incorrect climate control operation
- Incorrect outside temp display
Common causes
- Faulty ambient temp sensor
- Wiring damage
- Sensor location issue (heat soak)
Diagnostic steps
- Test sensor resistance across temperature range
- Inspect wiring
- Check sensor mounting location
Repair notes
Replace ambient air temperature sensor.
Other Powertrain codes on this vehicle
P0071
Ambient Air Temperature Sensor Range/Performance
P0072
Ambient Air Temperature Sensor Circuit Low
P0073
Ambient Air Temperature Sensor Circuit High
P0115
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P0116
ECT Sensor 1 Circuit Range/Performance
P0117
ECT Sensor 1 Circuit Low Input
P0118
ECT Sensor 1 Circuit High Input
P0119
ECT Sensor 1 Circuit Intermittent
P0125
Insufficient Coolant Temperature for Closed Loop Fuel Control
P0128
Coolant Thermostat Below Regulating Temperature