P0098 fault code: Intake Air Temperature Sensor 2 Circuit High

P0098 means “Intake Air Temperature Sensor 2 Circuit High” — a fuel and air metering fault in the powertrain.

Can I DIY?

Professional-only boundary. Scan P0098; do not reseat a hot, buried IAT-2 plug as a repair.

Do not DIYReviewed page boundary
ToolsSpecialist equipment

This is the conservative boundary from the reviewed code record. This page has no frozen site-wide safety grade, so it does not publish a repair route.

What to tell the garage about P0098

Do not drive. The second intake-air temperature sensor circuit is too high. That often means an open wire or an unplugged sensor, not that the weather is unusually hot.

Take these reviewed, code-specific details with you. They help the garage confirm the fault without turning this page into a repair procedure.

  • Intake Air Temperature Sensor 2 Circuit High: Registration number
  • Intake Air Temperature Sensor 2 Circuit High: Exact code P0098 and companion codes
  • Intake Air Temperature Sensor 2 Circuit High: Whether anyone recently unplugged a sensor in the air pipe
  • Intake Air Temperature Sensor 2 Circuit High: Whether the light came on after a long hot run or on a cold start
P00xxFuel and air metering
MOT fail riskif the warning light stays on

What does P0098 mean?

P0098 is a generic (SAE standard) powertrain code reported by your car’s engine control unit. It sits in the P00xx block, which covers fuel and air metering. The stored description is “Intake Air Temperature Sensor 2 Circuit High”. The code itself tells you which circuit or system tripped the fault — not always the exact part that failed.

Will P0098 fail an MOT?

An illuminated engine management light is a Major defect at MOT until the fault is repaired and the lamp stays off. P0098 is a high circuit on intake-air temperature sensor 2, not an MOT under-bonnet heat advisory.

Before booking your test, check what usually fails on your car: see our MOT pass rates by make and model, built from 33.1 million DVSA tests.

Related guides

Car diagnostic test cost: compare the scopeUK booking marketplaces currently publish diagnostic averages of about £52–£65. Engine management light on: steady or flashing?A steady engine management light means the computer has stored a fault. Drive with caution and get the code read. A flashing light is different — stop when it is safe.
P0001Fuel Volume Regulator Control Circuit/Open P0002Fuel Volume Regulator Control Circuit Range/Performance P0003Fuel Volume Regulator Control Circuit Low P0004Fuel Volume Regulator Control Circuit High P0005Fuel Shutoff Valve 'A' Control Circuit/Open P0006Fuel Shutoff Valve 'A' Control Circuit Low P0007Fuel Shutoff Valve 'A' Control Circuit High P0008Engine Position System Performance

P0098 — quick answers

Is it safe to drive with P0098?

Do not drive. We have no verified driving guidance for P0098 — treat as do not drive until checked. Do not assume a high circuit equals a heat-soak problem you can ignore.

Will P0098 fail my MOT?

An illuminated engine management light is a Major defect at MOT until the fault is repaired and the lamp stays off. P0098 is a high circuit on intake-air temperature sensor 2, not an MOT under-bonnet heat advisory.

Fault-code identifiers are standard diagnostic facts. Their explanations and diagnostic guidance on this site are original editorial summaries, not reproduced SAE wording. MOT defect rules reflect the DVSA MOT inspection manual (2026). This page is general guidance for UK drivers, not a substitute for a professional diagnosis.