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What Causes the 4LO Light to Flash?

1 Answers

KalebAnn

07/30/25 7:18am

4LO flashing is caused by: 1. Engine misfire leading to excessively high exhaust temperature; 2. Individual cylinders not functioning properly; 3. Overly rich air-fuel mixture causing poor combustion in the engine. Taking the Prado as an example, solutions for 4LO flashing include: 1. Switch between high-range and low-range 4WD, rev the engine a few times during the switching process, and firmly press the ABS sensor connectors near the front and rear wheels as well as the 4WD transfer case connector under the middle of the vehicle; 2. Disconnect the battery for 10 minutes and then reconnect it to see if the issue resolves; 3. Use a diagnostic scanner to read specific fault codes and proceed with repairs. The Prado is an imported ORV with excellent power performance, meeting Euro III emission standards. Its advanced engine delivers strong output power and torque, complemented by a highly rigid frame and reinforced suspension system, making rough journeys comfortable and smooth.

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