P0A3B Possible Causes
- Faulty hybrid vehicle engine
- Hybrid vehicle engine wiring harness open or shorted
- Poor electrical connection of hybrid vehicle engine circuit
What Does It Mean?
How to Fix P0A3B Code
Check the “possible causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0A3B Possible Symptoms
Check engine light illuminated (or service engine soon warning light)
P0A3B Meaning
Engine temperature sensor No. 2 detects the transmission-differential fluid temperature. The resistance of the thermistor installed in engine temperature sensor No. 2 varies with changes in transmission-differential fluid temperature. The construction of engine temperature sensor No. 2 and how it is connected to the HV control ECU are the same as those of engine temperature sensor No. 1.
Based on the signal provided by engine temperature sensor No. 2, the HV control ECU limits the load to prevent engine overheating. Additionally, the HV control ECU checks engine temperature sensor No. 2 for wiring malfunction and the sensor for malfunction.