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All Toyota fault codes

Oxygen (lambda) sensors

P1153 Air/fuel ratio sensor slow to respond (bank 2, sensor 1)

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P1153 means: Air/fuel ratio sensor slow to respond (bank 2, sensor 1). The oxygen sensor measures oxygen in the exhaust and the computer sets the fuel mixture by it. OK to drive, but have it checked soon. The most common repair costs about €90–180 in Estonia, depending on make and model.

Is it safe to drive?OK to driveOK to drive, but have it checked soon.
Oxygen sensor replacement€90–180parts and labour in Estonia, depending on make and model

What it means

The oxygen sensor measures oxygen in the exhaust and the computer sets the fuel mixture by it. Sensor 1 sits before the catalytic converter, sensor 2 after it. The computer found the signal wrong, slow or missing.

This is a make-specific code (Toyota). The exact meaning can vary by model and year.

What you may notice

  • Engine light on
  • Higher fuel consumption
  • Idle may be uneven
  • Emissions may fail the inspection

What could be wrong

  1. 1Old or faulty oxygen sensor · Oxygen sensor replacement €90–180
  2. 2Exhaust leak ahead of the sensor · Sensor replacement €80–160
  3. 3Damaged wire or connector · Wiring or connector repair €45–90
  4. 4The mixture really is off (air leak or injector) · Leak check and hose or gasket replacement €60–120

Repair difficulty: Moderate

What you can check yourself

Listen for an exhaust leak ahead of the sensor. Check that the sensor wire is intact and the connector is clipped in. You can do the simpler checks yourself.

How we fix it

  1. We check the sensor signal and fuel trims on the diagnostic tool
  2. We check for exhaust leaks
  3. We replace the oxygen sensor if it is old or slow

Standard SAE description: A/F Sensor Circuit Response (Bank 2 Sensor 1)

This code usually comes with: Check engine lightSee what the light means →

Want a definite answer?

Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.

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Questions

What does fault code P1153 mean?

Air/fuel ratio sensor slow to respond (bank 2, sensor 1). The oxygen sensor measures oxygen in the exhaust and the computer sets the fuel mixture by it. Sensor 1 sits before the catalytic converter, sensor 2 after it. The computer found the signal wrong, slow or missing.

Can I drive with code P1153?

OK to drive, but have it checked soon.

How much does it cost to fix P1153?

It depends on the cause: oxygen sensor replacement €90–180; sensor replacement €80–160; wiring or connector repair €45–90. Prices include labour at €45/h, depending on make and model.

How is P1153 fixed?

We check the sensor signal and fuel trims on the diagnostic tool. We check for exhaust leaks. We replace the oxygen sensor if it is old or slow.

Related codes

P1133Air/fuel ratio sensor slow to respond (bank 1, sensor 1)P1152Front oxygen sensor not switching, reads rich (bank 2)P1155Air/fuel ratio sensor heater: circuit fault (bank 2, sensor 1)P0136Fault in the rear oxygen sensor wiringP0137Rear oxygen sensor voltage too lowP0138Rear oxygen sensor voltage too high

Based on AI combined with our hands-on workshop experience and knowledge. This information is general and prices are approximate (Estonian workshop rates). The same code can mean different things on different cars. Only an inspection of the car gives a definite answer.

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