Are you having trouble with your Kia’s P0136 code? This code is associated with a malfunction in the HO2S-12 (Bank 1 Sensor 2) Circuit. The code is triggered when the engine is started, running in closed loop, and the PCM detects the HO2S signal is either more than 1.4 volts or less than 0.02 volts during the CCM test. There are a few potential causes for this code, but in most cases, it is the result of an open or shorted signal circuit, a damaged or failed HO2S, or a failed PCM.
P0136 Causes and Solutions
| Cause | Solution |
|---|---|
| HO2S signal circuit open or shorted to ground | Check for any corroded wiring and replace if necessary. |
| HO2S signal circuit shorted to VREF or system power (B+) | Check for any loose wires in the circuit and repair if necessary. |
| HO2S is damaged or has failed | Replace the HO2S with a new part. |
| PCM has failed | Replace the PCM with a new one. |
Trouble codes can be a real headache, especially when they involve the Kia P0136 code. This code is related to a malfunction in the HO2S-12 (Bank 1 Sensor 2) Circuit and generally occurs when the engine is running and the PCM detects the HO2S signal is either too high or too low. While there are multiple possible causes for this code, it is most commonly the result of an open or shorted signal circuit, a damaged or failed HO2S, or a failed PCM. Fortunately, each of these causes has a potential solution and can be fixed.
HO2S Signal Circuit Open or Shorted to Ground
When the HO2S signal circuit is open or shorted to ground, the Kia P0136 code will likely be triggered. To fix this problem, the wiring should be checked for corrosion and replaced if necessary.
HO2S Signal Circuit Shorted to VREF or System Power (B+)
If the HO2S signal circuit is shorted to VREF or system power (B+), it can also cause the Kia P0136 code. To remedy this situation, all wires in the circuit should be checked for looseness and repaired if needed.
HO2S is Damaged or Has Failed
The Kia P0136 code can also be triggered if the HO2S is damaged or has failed. To fix this issue, the HO2S should be replaced with a new part.
PCM has Failed
The last potential cause of the Kia P0136 code is a failed PCM. If this is the case, the only solution is to replace the PCM with a new one.
Conclusion: Solving the Kia P0136 Code
When it comes to Kia P0136 codes, the main culprits are an open or shorted signal circuit, a damaged or failed HO2S, or a failed PCM. Fortunately, each of these causes has a fix, and the code can be cleared. With a bit of troubleshooting and some minor repairs, the Kia P0136 code can be fixed and the vehicle can be back on the road in no time.
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