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Home / DTC / P0110 — Intake Air Temperature Sensor 1 Circuit Bank 1

P0110 — Intake Air Temperature Sensor 1 Circuit Bank 1

Detailed page for trouble code P0110.

34,405codes
59brands
11,914generic
22,491specific
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Code

P0110

Generic P — Powertrain

Intake Air Temperature Sensor 1 Circuit Bank 1

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in IAT sensor wiring
  • Corroded, loose, or contaminated connector
  • Failed IAT sensor (thermistor)
  • Faulty 5V reference or ground from PCM/ECM
  • Intermittent wiring damage (chafing, pinched harness)
  • Related control module fault or poor module ground

Symptoms

  • Check Engine Light (MIL) illuminated
  • Inaccurate or fluctuating intake air temp reading on scan tool
  • Poor idle quality, rough running or hesitation
  • Hard starting or extended cranking time
  • Reduced fuel economy and performance
  • Possible increased emissions or failed emissions test

What to check

  • Read freeze frame and live IAT values with a scan tool; note ambient vs. reported IAT
  • Check for related codes (P0111/P0112/P0113 etc.)
  • Visually inspect sensor and wiring for damage, corrosion, loose pins
  • Backprobe sensor connector to measure signal voltage and presence of reference voltage and ground (key ON, engine OFF)
  • Measure sensor resistance with sensor disconnected and compare to specification or expected thermistor behavior
  • Wiggle test wiring while monitoring live data to reproduce intermittent faults

Signal parameters

  • IAT sensor is typically an NTC thermistor: resistance decreases as intake air temperature rises
  • Typical sensor voltage output is monotonic with temperature; expect a stable voltage in the ~0.2–4.8 V range across ambient extremes (vehicle-specific)
  • At normal ambient temps, scan-tool IAT reading should track ambient air temperature within a reasonable range (±5–10°C)
  • Resistance vs. temperature should follow a smooth curve; sudden open (infinite) or short (near 0 Ω) indicates fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze-frame data; record IAT reading and conditions when code set.
  2. Visually inspect IAT sensor, connector, and wiring for damage, corrosion, or pin push-out. Repair as needed.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference (if used), ground, and sensor signal voltage present and within expected range. If no reference or ground, trace to PCM.
  4. Unplug sensor and measure resistance across sensor terminals at known ambient temperature. Confirm resistance follows expected thermistor behavior (consult vehicle spec).
  5. If resistance or voltage out of spec, replace sensor and recheck. If sensor OK, perform continuity and resistance checks between sensor connector and PCM pins to find opens/shorts.
  6. Wiggle harness and connectors while monitoring live IAT data to find intermittent faults.
  7. If wiring and sensor are good but signal still erratic, check PCM grounds and test/replace PCM if manufacturer procedures indicate module failure.
  8. Clear codes, perform test drive or run engine to confirm code does not return and IAT readings are plausible.

Likely causes

  • Damaged sensor harness at intake or near firewall
  • Plugged connector terminals from moisture/contaminant
  • IAT sensor failed due to age/heat/vibration
  • 5V reference circuit open or shorted
  • Previous repairs with improper routing or clamps

Fault status

⚠️ Status
P0110 - Intake Air Temperature Sensor 1 Circuit Bank 1: IAT circuit malfunction (open/short/intermittent).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0111 P0112 P0113 P0114 P0102
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Code

P0110

LAND ROVER P — Powertrain

Intake Air Temperature Sensor Circuit

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in IAT sensor wiring
  • Corroded, loose, or contaminated connector
  • Failed IAT sensor (thermistor)
  • Faulty 5V reference or ground from PCM/ECM
  • Intermittent wiring damage (chafing, pinched harness)
  • Related control module fault or poor module ground

Symptoms

  • Check Engine Light (MIL) illuminated
  • Inaccurate or fluctuating intake air temp reading on scan tool
  • Poor idle quality, rough running or hesitation
  • Hard starting or extended cranking time
  • Reduced fuel economy and performance
  • Possible increased emissions or failed emissions test

What to check

  • Read freeze frame and live IAT values with a scan tool; note ambient vs. reported IAT
  • Check for related codes (P0111/P0112/P0113 etc.)
  • Visually inspect sensor and wiring for damage, corrosion, loose pins
  • Backprobe sensor connector to measure signal voltage and presence of reference voltage and ground (key ON, engine OFF)
  • Measure sensor resistance with sensor disconnected and compare to specification or expected thermistor behavior
  • Wiggle test wiring while monitoring live data to reproduce intermittent faults

Signal parameters

  • IAT sensor is typically an NTC thermistor: resistance decreases as intake air temperature rises
  • Typical sensor voltage output is monotonic with temperature; expect a stable voltage in the ~0.2–4.8 V range across ambient extremes (vehicle-specific)
  • At normal ambient temps, scan-tool IAT reading should track ambient air temperature within a reasonable range (±5–10°C)
  • Resistance vs. temperature should follow a smooth curve; sudden open (infinite) or short (near 0 Ω) indicates fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze-frame data; record IAT reading and conditions when code set.
  2. Visually inspect IAT sensor, connector, and wiring for damage, corrosion, or pin push-out. Repair as needed.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference (if used), ground, and sensor signal voltage present and within expected range. If no reference or ground, trace to PCM.
  4. Unplug sensor and measure resistance across sensor terminals at known ambient temperature. Confirm resistance follows expected thermistor behavior (consult vehicle spec).
  5. If resistance or voltage out of spec, replace sensor and recheck. If sensor OK, perform continuity and resistance checks between sensor connector and PCM pins to find opens/shorts.
  6. Wiggle harness and connectors while monitoring live IAT data to find intermittent faults.
  7. If wiring and sensor are good but signal still erratic, check PCM grounds and test/replace PCM if manufacturer procedures indicate module failure.
  8. Clear codes, perform test drive or run engine to confirm code does not return and IAT readings are plausible.

Likely causes

  • Damaged sensor harness at intake or near firewall
  • Plugged connector terminals from moisture/contaminant
  • IAT sensor failed due to age/heat/vibration
  • 5V reference circuit open or shorted
  • Previous repairs with improper routing or clamps

Fault status

⚠️ Status
P0110 - Intake Air Temperature Sensor 1 Circuit Bank 1: IAT circuit malfunction (open/short/intermittent).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0111 P0112 P0113 P0114 P0102
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

P0110

MITSUBISHI P — Powertrain

Intake air temperature sensor

Brand: MITSUBISHI
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in IAT sensor wiring
  • Corroded, loose, or contaminated connector
  • Failed IAT sensor (thermistor)
  • Faulty 5V reference or ground from PCM/ECM
  • Intermittent wiring damage (chafing, pinched harness)
  • Related control module fault or poor module ground

Symptoms

  • Check Engine Light (MIL) illuminated
  • Inaccurate or fluctuating intake air temp reading on scan tool
  • Poor idle quality, rough running or hesitation
  • Hard starting or extended cranking time
  • Reduced fuel economy and performance
  • Possible increased emissions or failed emissions test

What to check

  • Read freeze frame and live IAT values with a scan tool; note ambient vs. reported IAT
  • Check for related codes (P0111/P0112/P0113 etc.)
  • Visually inspect sensor and wiring for damage, corrosion, loose pins
  • Backprobe sensor connector to measure signal voltage and presence of reference voltage and ground (key ON, engine OFF)
  • Measure sensor resistance with sensor disconnected and compare to specification or expected thermistor behavior
  • Wiggle test wiring while monitoring live data to reproduce intermittent faults

Signal parameters

  • IAT sensor is typically an NTC thermistor: resistance decreases as intake air temperature rises
  • Typical sensor voltage output is monotonic with temperature; expect a stable voltage in the ~0.2–4.8 V range across ambient extremes (vehicle-specific)
  • At normal ambient temps, scan-tool IAT reading should track ambient air temperature within a reasonable range (±5–10°C)
  • Resistance vs. temperature should follow a smooth curve; sudden open (infinite) or short (near 0 Ω) indicates fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze-frame data; record IAT reading and conditions when code set.
  2. Visually inspect IAT sensor, connector, and wiring for damage, corrosion, or pin push-out. Repair as needed.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference (if used), ground, and sensor signal voltage present and within expected range. If no reference or ground, trace to PCM.
  4. Unplug sensor and measure resistance across sensor terminals at known ambient temperature. Confirm resistance follows expected thermistor behavior (consult vehicle spec).
  5. If resistance or voltage out of spec, replace sensor and recheck. If sensor OK, perform continuity and resistance checks between sensor connector and PCM pins to find opens/shorts.
  6. Wiggle harness and connectors while monitoring live IAT data to find intermittent faults.
  7. If wiring and sensor are good but signal still erratic, check PCM grounds and test/replace PCM if manufacturer procedures indicate module failure.
  8. Clear codes, perform test drive or run engine to confirm code does not return and IAT readings are plausible.

Likely causes

  • Damaged sensor harness at intake or near firewall
  • Plugged connector terminals from moisture/contaminant
  • IAT sensor failed due to age/heat/vibration
  • 5V reference circuit open or shorted
  • Previous repairs with improper routing or clamps

Fault status

⚠️ Status
P0110 - Intake Air Temperature Sensor 1 Circuit Bank 1: IAT circuit malfunction (open/short/intermittent).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0111 P0112 P0113 P0114 P0102
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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+100 karma for a short comment :)
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Code

P0110

OPEL P — Powertrain

CAN-Bus No Communication with ECM (Engine Control Module)

Brand: OPEL
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in IAT sensor wiring
  • Corroded, loose, or contaminated connector
  • Failed IAT sensor (thermistor)
  • Faulty 5V reference or ground from PCM/ECM
  • Intermittent wiring damage (chafing, pinched harness)
  • Related control module fault or poor module ground

Symptoms

  • Check Engine Light (MIL) illuminated
  • Inaccurate or fluctuating intake air temp reading on scan tool
  • Poor idle quality, rough running or hesitation
  • Hard starting or extended cranking time
  • Reduced fuel economy and performance
  • Possible increased emissions or failed emissions test

What to check

  • Read freeze frame and live IAT values with a scan tool; note ambient vs. reported IAT
  • Check for related codes (P0111/P0112/P0113 etc.)
  • Visually inspect sensor and wiring for damage, corrosion, loose pins
  • Backprobe sensor connector to measure signal voltage and presence of reference voltage and ground (key ON, engine OFF)
  • Measure sensor resistance with sensor disconnected and compare to specification or expected thermistor behavior
  • Wiggle test wiring while monitoring live data to reproduce intermittent faults

Signal parameters

  • IAT sensor is typically an NTC thermistor: resistance decreases as intake air temperature rises
  • Typical sensor voltage output is monotonic with temperature; expect a stable voltage in the ~0.2–4.8 V range across ambient extremes (vehicle-specific)
  • At normal ambient temps, scan-tool IAT reading should track ambient air temperature within a reasonable range (±5–10°C)
  • Resistance vs. temperature should follow a smooth curve; sudden open (infinite) or short (near 0 Ω) indicates fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze-frame data; record IAT reading and conditions when code set.
  2. Visually inspect IAT sensor, connector, and wiring for damage, corrosion, or pin push-out. Repair as needed.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference (if used), ground, and sensor signal voltage present and within expected range. If no reference or ground, trace to PCM.
  4. Unplug sensor and measure resistance across sensor terminals at known ambient temperature. Confirm resistance follows expected thermistor behavior (consult vehicle spec).
  5. If resistance or voltage out of spec, replace sensor and recheck. If sensor OK, perform continuity and resistance checks between sensor connector and PCM pins to find opens/shorts.
  6. Wiggle harness and connectors while monitoring live IAT data to find intermittent faults.
  7. If wiring and sensor are good but signal still erratic, check PCM grounds and test/replace PCM if manufacturer procedures indicate module failure.
  8. Clear codes, perform test drive or run engine to confirm code does not return and IAT readings are plausible.

Likely causes

  • Damaged sensor harness at intake or near firewall
  • Plugged connector terminals from moisture/contaminant
  • IAT sensor failed due to age/heat/vibration
  • 5V reference circuit open or shorted
  • Previous repairs with improper routing or clamps

Fault status

⚠️ Status
P0110 - Intake Air Temperature Sensor 1 Circuit Bank 1: IAT circuit malfunction (open/short/intermittent).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0111 P0112 P0113 P0114 P0102
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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