P0130 fault code: O2 Sensor Circuit Medium severity

P0130 means “O2 Sensor Circuit” — a fuel & air metering fault in the powertrain. Usually safe to drive short-term, but sustained lean or rich running can damage the catalytic converter — an expensive follow-on repair. Typical UK repair cost: £40–£450 depending on the underlying cause.
MediumSeverity
P01xxFuel & Air Metering
£40–450Typical UK repair cost
MOT fail riskif the warning light stays on

What does P0130 mean?

P0130 is a generic (SAE standard) powertrain code reported by your car’s engine control unit. It sits in the P01xx block, which covers fuel & air metering. The stored description is “O2 Sensor Circuit”. The code itself tells you which circuit or system tripped the fault — not always the exact part that failed, which is why a short diagnosis pays for itself before replacing components.

Symptoms you may notice

  • Rough idle or hesitation when accelerating
  • Higher than normal fuel consumption
  • Engine management light on, sometimes flashing under load
  • Reduced power, especially noticeable when overtaking

Most common causes

  1. Dirty or failing mass air flow (MAF) sensor
  2. Vacuum or intake leaks after the airflow sensor
  3. Blocked or leaking fuel injectors
  4. Weak fuel pump or clogged fuel filter
  5. Faulty oxygen (lambda) sensor skewing the fuel trim

How to diagnose P0130 yourself

  1. Read live fuel trim data with an OBD2 scanner — long-term trims beyond ±10% point to a lean or rich condition
  2. Inspect intake hoses and vacuum lines for splits or loose clips
  3. Clean the MAF sensor with dedicated MAF cleaner (never carb cleaner)
  4. Check fuel pressure against the manufacturer specification
  5. Clear the code and monitor whether it returns over a full drive cycle
Tools that read and clear P0130

A basic code reader confirms the fault; a full-system scanner shows the live data you need for the steps above.

Will P0130 fail an MOT?

An engine management light that stays on is a Major defect and an automatic MOT fail. Emissions-related faults in this group also risk failing the tailpipe emissions test itself.

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.

Typical UK repair costs

OutcomeTypical cost (parts + labour)
DIY: read code + basic checks£0 (scanner assumed)
Independent garage diagnosis£30–£60
Typical repair range for this fault£40–£450
Main dealer equivalent£60–£810

Costs are indicative UK ranges for independent garages in 2026. Main dealers typically charge 40–80% more.

Diagnose the symptom, then price the repair

Car diagnostic test cost UK (2026): scan vs actual diagnosis£40–£100 is typical for an independent first assessment — but a code read is not the same as finding the cause.
P0100Mass or Volume Air Flow Circuit P0101Mass or Volume Air Flow Circuit Range/Performance P0102Mass or Volume Air Flow Circuit Low Input P0103Mass or Volume Air Flow Circuit High Input P0104Mass or Volume Air Flow Circuit Intermittent P0105Manifold Absolute Pressure/Barometric Pressure Circuit P0106Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance P0107Manifold Absolute Pressure/Barometric Pressure Circuit Low Input

P0130 — quick answers

Is it safe to drive with P0130?

Usually safe to drive short-term, but sustained lean or rich running can damage the catalytic converter — an expensive follow-on repair.

Will P0130 clear itself?

If the underlying fault stops occurring, most ECUs extinguish the light after around 40 healthy warm-up cycles — but the code stays stored as history. Fix the cause, clear it with a scanner, then confirm it stays away over a full drive cycle.

How much does it cost to fix P0130 in the UK?

Typically £40–£450 at an independent garage depending on which cause you confirm. Diagnosing it yourself with a scanner avoids a £30–£60 diagnostic fee and stops parts being replaced on guesswork.

Will P0130 fail my MOT?

An engine management light that stays on is a Major defect and an automatic MOT fail. Emissions-related faults in this group also risk failing the tailpipe emissions test itself.

Code definitions follow the SAE J2012 standard. 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.