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DTC/P0132·Mitsubishi

P0132 on Mitsubishi: Causes, Symptoms and Fix Cost

Quick Answer
Moderate SeveritySafe to drive (short-term)Mitsubishi

P0132 on a Mitsubishi means the upstream oxygen sensor on bank 1 (before the catalytic converter) is reporting a voltage above what the engine computer accepts. On a conventional narrowband sensor, even a very rich mixture only takes the signal to about 0.9 V, so a reading held higher usually points to a short to voltage in the wiring or a failed sensor rather than rich running. While the code is set, the engine computer cannot trim the mixture properly, which raises fuel use and emissions.

Typical repair cost, all makes€45 - €400

Connect any standard Bluetooth OBD2 adapter to your Mitsubishi and Skanyx tells you what P0132 means on that engine, whether it is safe to keep driving, and what the fix should cost. Free on iPhone and Android.

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What does P0132 mean on a Mitsubishi?

The Quick Answer above is the generic definition. What follows is the model-specific detail for the Mitsubishi models that log P0132.

Mitsubishi Lancer

2009

Mitsubishi's US workshop manual for the 2009 Lancer sets P0132 when the front heated oxygen sensor output stays at 1.8 V or higher for 2 seconds, a level a narrowband sensor cannot reach from a rich mixture alone. The probable causes it lists are a short in the sensor output line, a damaged connector, or the engine control module, so check the harness and plug before ordering a sensor.

What causes P0132 on a Mitsubishi?

Beyond the generic causes listed on the main P0132 page, these are the patterns noted for Mitsubishi models:

Mitsubishi LancerShort circuit in the front oxygen sensor output line
Mitsubishi LancerDamaged connector between the front oxygen sensor and the engine control module

How to diagnose P0132 on a Mitsubishi with OBD2

Follow these steps to pinpoint the root cause of P0132:

  1. Read every stored code and the freeze frame. Rich fuel trim codes (P0172), misfire codes or MAF codes change the picture and should be looked at first
  2. Find out whether your engine has a narrowband or a wideband (air-fuel ratio) sensor in this position. The voltage figures in the next steps apply to narrowband sensors; a wideband sensor is read as a lambda value near 1.00 on a generic OBD2 reader
  3. With the engine fully warm, watch the bank 1 sensor 1 signal. A narrowband sensor that sits above about 1 V is not reporting a real mixture. Then lift off the throttle from about 2,500 rpm in gear: the fuel cut on overrun should drive a working narrowband signal below 0.2 V within a second or two. A signal that stays high is a circuit or sensor fault
  4. Compare the reading with the fuel trims. Strongly negative long-term trims with a sensor that still switches point to a real rich condition; normal trims with a signal pinned high point to the circuit
  5. Unplug the sensor with the key on and watch the live value again. If the high reading stays with the sensor disconnected, the fault is in the harness or the engine computer, not the sensor
  6. Inspect the harness along the exhaust for melted insulation that has joined the heater feed to the signal wire, and check the plug for water, green corrosion or bent pins
  7. If the wiring is sound and the trims are normal, replace the sensor with one that matches the original part number, clear the code and confirm that the signal now switches normally on a warm engine

How much does P0132 cost to fix on a Mitsubishi? (EUR)

Estimated repair costs for P0132 in EUR, compiled across makes. Mitsubishi costs typically sit in the middle of each range.

Repair Parts Cost Labor Cost Total Estimate DIY Difficulty
Replace upstream O2 sensor (bank 1 sensor 1), narrowband type €30–€150 €50–€120 €80–€270 Moderate
Replace upstream wideband (air-fuel ratio) sensor, OE quality €100–€280 €50–€120 €150–€400 Moderate
Repair O2 sensor wiring or connector €5–€25 €40–€120 €45–€145 Moderate
Replace faulty fuel pressure regulator causing rich running €40–€180 €60–€150 €100–€330 Professional

Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.

These codes are often seen alongside P0132 or point to related issues, on any make:

P0130P0131P0133P0134P0152P0172P0420

Looking for the full P0132 reference (all makes, full diagnosis flow, complete repair cost matrix)?

See the main P0132 guide
Skanyx · Mitsubishi

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