AutoCodes - OBDII Code List - P0142 TOYOTA

P0142 TOYOTA - HO2S13 Circuit Fault

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3
Table of contents

P0142 TOYOTA Possible Causes

  • Faulty Heated Oxygen Sensor Bank 1 Sensor 3
  • Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted
  • Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection

How do I fix code P0142 TOYOTA?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
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Tech Notes

Replacing the O2 Sensor 3 usually takes care of the problem

Cost of diagnosing the P0142 TOYOTA code

Labor: 1.0

The cost of diagnosing the P0142 TOYOTA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

P0142 TOYOTA Description

The rear heated oxygen sensor (or sensor 3 for some vehicles), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Even if switching characteristics of the heated oxygen sensor 1 are shifted, the air-fuel ratio is controlled to stoichiometric, by the signal from the heated oxygen sensor 3.
This sensor is made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. Under normal conditions the heated oxygen sensor 3 is not used for engine control operation.
OBDII Code P0142 Toyota - HO2S13 Circuit Fault -

More Information

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