What does fault code P0138 mean?
Diagnostic trouble code P0138 is defined as Powertrain Diagnostic Fault Code P0138. This standard OBD2 code is triggered when your car's powertrain or module sensor voltage deviates from calibrated safety tolerances.
Severity & Can I Drive With Code P0138?
Severity Rating: 2/5 (Moderate Severity)
ℹ️ Can I Drive? You can drive short distances safely, but address this fault soon to maintain optimal engine performance and pass emissions testing.
Common Symptoms of P0138
- Check Engine Light (MIL) illuminated for P0138
- Occasional hesitation under load
Common Causes Ranked by Likelihood
- Faulty sensor or circuit in P0138 monitoring pathway
- Wiring harness corrosion
- ECU signal out of range
DIY Repair & Troubleshooting Steps
- Inspect sensor connectors for P0138
- Test circuit voltage using OBDAssistant live telemetry
Professional Shop Repair & Estimated Cost Range
- Replace failing sensor component
- Repair harness wiring
Estimated Repair Cost Range: $60 - $400
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