Error code

OBD2 P2199

OBD2P2199
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Intake Air Temperature Sensor 1 / 2 Correlation.

Severity

moderateCan drive but may experience performance issues.

Summary

P2199 indicates a correlation issue between two Intake Air Temperature (IAT) sensors in the engine's air intake system.

Symptoms

  • Stored trouble code
  • Possible illuminated warning light
  • Increased fuel consumption
  • Lean or rich running condition at cold start-up

Common Causes

  • Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors
  • Defective IAT sensors
  • Oil contamination of an IAT sensor’s element
  • Failed or failing PCM (rare)

Diagnosis

  1. Record all fault codes and freeze frame data.
  2. Locate both IAT sensors and their wiring.
  3. Inspect for damaged or corroded wiring/connectors.
  4. Perform reference voltage, resistance, ground, and continuity checks on wiring.
  5. Test each IAT sensor with a hair dryer to check signal voltages against temperature-to-voltage chart.
  6. Clean MAF/IAT sensor elements if oil contamination is suspected.

Fixes

  • Replace damaged or defective wiring/connectors and sensors as needed.

FAQ

Can I drive with P2199?

Yes, but you may experience performance issues like increased fuel consumption.

What causes P2199?

Common causes include damaged wiring/connectors and defective IAT sensors.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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