Intake Air Temperature Circuit Intermittent Bank 1
The P0114 code indicates an intermittent fault in the Intake Air Temperature (IAT) sensor circuit for Bank 1. The IAT sensor measures incoming air temperature and sends a voltage signal to the PCM. An intermittent circuit issue means the signal is erratic or drops out temporarily, often due to loose connections, damaged wiring, or a failing sensor. This can cause incorrect air-fuel mixture adjustments, affecting engine performance and fuel economy.
01. Most Common Causes
- Faulty intake air temperature sensor
- Damaged or corroded wiring/connector in the IAT circuit
- Loose electrical connection at the sensor
- Intermittent short or open in the sensor circuit
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor engine performance or hesitation
- Decreased fuel economy
- Rough idle or stalling
03. Step-by-Step Diagnosis
Step 1: Scan the vehicle for codes and record freeze frame data to confirm P0114.
Step 2: Visually inspect the IAT sensor connector and wiring for damage, corrosion, or looseness.
Step 3: Test the IAT sensor resistance with a multimeter and compare to manufacturer specifications.
Step 4: Check for intermittent signal by gently wiggling the wiring harness while monitoring sensor voltage with a scan tool.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe for short trips, but the intermittent nature can cause drivability issues and reduced fuel economy. It's best to diagnose and repair promptly to avoid potential engine performance problems.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150, including parts (IAT sensor) and labor. If wiring repair is needed, costs may be higher.