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P1138 Pontiac Code - HO2S Bank 1 Sensor 2 Rich or High Voltage

- Code Popularity: 4,298 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1138 Pontiac?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty HO2S Bank 1 Sensor 2
  • HO2S Bank 1 Sensor 2 harness is open or shorted
  • HO2S Bank 1 Sensor 2 circuit poor electrical connection
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How to Fix the DTC P1138 Pontiac?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1138 Pontiac code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P1138 Pontiac Description

In order to control emissions, a catalytic converter converts any harmful exhaust emissions into harmless water vapor and carbon dioxide. The Powertrain Control Module (PCM) can monitor this process by using a rear Heated Oxygen Sensor 2 (HO2S 2). The HO2S 2, located in the exhaust stream past the catalytic converter, produces an output signal which indicates the storage capacity of the catalyst. This signal indicates the catalyst's ability to effectively convert the exhaust emissions. If the catalyst is functioning properly, the HO2S 2 signal will be far less active than the signal produced by the front Heated Oxygen Sensor 1 (HO2S 1).

OBDII Code P1138 Pontiac - HO2S Bank 1 Sensor 2 Rich or High Voltage - AutoCodes.com
P1138 Pontiac Code - HO2S Bank 1 Sensor 2 Rich or High Voltage

Need More Information on the Code?

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Code P1138 Pontiac comments

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