Complete diagnostic information for error code P0112
Manufacturer-Specific Variations
This code (P0112) may have different meanings or additional parameters depending on your vehicle's make, model, and year. Always verify with your vehicle's service manual or a qualified technician before attempting repairs.
P0112
Powertrain CodeIntake Air Temperature Sensor 1 Signal too Low
Description
Intake Air Temperature (IAT) Sensor-1 (G42), Signal too Low
Common Symptoms
- Check Engine Light
- Abnormally low intake air temperature readings
- Possible excessive cold air compensation by ECU
- Fuel mixture issues in cold conditions
- Cold weather performance problems
Possible Causes
- Short to ground in IAT sensor circuit
- Failed IAT sensor
- Corroded or damaged sensor connections
- ECU reference voltage issues
- Sensor calibration error
Diagnosis Steps
- Check IAT sensor signal voltage
- Test for shorts to ground in sensor circuit
- Measure sensor resistance values
- Inspect connections for corrosion or damage
- Verify ECU reference voltage
Repair Solutions
- Repair shorted sensor wiring to ground
- Replace faulty intake air temperature sensor
- Clean or replace corroded connections
- Fix ECU reference voltage if needed
- Reset temperature system adaptations
Prevention Tips
- Protect temperature sensor wiring from moisture
- Regular electrical connection maintenance
- Address abnormal temperature readings immediately
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