What Does P0114 Mean?
The ECM has detected intermittent or erratic signal behavior from the Intake Air Temperature (IAT) sensor circuit on bank 1. The signal is fluctuating between valid and invalid ranges unpredictably, or is dropping in and out. This can cause momentary fuel metering inaccuracies each time the signal glitches. The driver may notice occasional subtle hesitation or idle fluctuation.
Common Causes
35%
Intermittent connection at the IAT sensor connector (loose fit, vibration-sensitive)
25%
Chafed or partially broken wire in the IAT sensor harness making intermittent contact
20%
Corroded IAT sensor connector terminals causing intermittent high-resistance contact
15%
IAT sensor with marginal internal thermistor developing intermittent open or short
5%
Loose ECM connector pin on the IAT circuit
Diagnostic Steps
1
Monitor live IAT data while tapping on the sensor and wiggling the connector — watch for sudden jumps to -40°F (open) or 280°F (short).
2
Inspect the IAT connector for a broken lock tab, spread terminals, or corrosion. Ensure it clicks securely when reconnected.
3
Perform a wiggle test along the entire IAT sensor wiring harness while watching live data for signal interruption.
4
Measure IAT sensor resistance while gently flexing the sensor body — an intermittent internal failure will cause the resistance reading to jump erratically.
5
If the connector and harness check out, clean all connector terminals with electrical contact cleaner, apply dielectric grease, and monitor for recurrence over a drive cycle.
Estimated Repair Cost
$15 - $150
Parts + labor, varies by vehicle and location
The ECM has detected intermittent or erratic signal behavior from the Intake Air Temperature (IAT) sensor circuit on bank 1. The signal is fluctuating between valid and invalid ranges unpredictably, or is dropping in and out. This can cause momentary fuel metering inaccuracies each time the signal g...
The most common cause of P0114 (Intake Air Temperature Circuit Intermittent Bank 1) is: Intermittent connection at the IAT sensor connector (loose fit, vibration-sensitive)
Typical repair costs for P0114 range from $15 to $150, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive. Intermittent IAT signal glitches cause only momentary fuel trim deviations. The ECM recovers quickly when the signal returns to normal. No significant safety risk.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0114 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel / Air Metering
Difficulty
Type
Generic (SAE)
Recommended Tools
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