RX - 4th Gen (2016-2022) Discussion topics related to the 2016 and up RX350 and RX450h models

OBD codes

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Old

Mar 13, 2026 | 07:39 AM

#1

linkb0y

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1st Gear

Joined: Mar 2026

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OBD codes

Just bought a used 22 RX 450h. Ran the scanner and got 30 codes. All says fail to connect. I’m assuming the 12v battery is ready to go? Battery date is 2022 (possibly original). The battery health on the scanner say it is healthy at 12.5 reading.

Just bought a used 22 RX 450h. Ran the scanner and got 30 codes. All says fail to connect. I’m assuming the 12v battery is ready to go? Battery date is 2022 (possibly original). The battery health on the scanner say it is healthy at 12.5 reading.

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Old

Mar 13, 2026 | 08:21 AM

#2

ravenuer

Racer

Joined: Nov 2017

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From: New York

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I'd get the battery load-tested at a shop. It's the only way to properly test a battery.

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