HCAC System Variable Valve Circuit Low
Table of contents
P1438 LEXUS Possible Causes
- Faulty HCAC VSV
- HCAC VSV harness is open or shorted
- HCAC VSV circuit poor electrical connection
How do I fix code P1438 LEXUS?
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.
Cost of diagnosing the P1438 LEXUS code
The cost of diagnosing the P1438 LEXUS code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1438 LEXUS Description
The Engine Control Module (ECM) monitors the Exhaust Gas Temperature Sensor. The ECM sets the Diagnostic Trouble Code (DTC) when the Exhaust Gas Temperature Sensor is not to factory specifications. HCAC (Hydro-Carbon Absorber and Catalyst System) fault detected.