OBD Guide
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P1152

Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Rich Bank 2

P1152 is an OBD-II diagnostic trouble code meaning: Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Rich Bank 2. Common causes: faulty bank 2 oxygen sensor, leaking fuel injectors. Estimated repair cost: $33–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–89 (est.)

Symptoms

  • Increased fuel consumption
  • Unstable engine operation
  • Power Loss
  • Check Engine Light Is On
  • Black smoke from the exhaust pipe

Causes

  • Faulty Bank 2 oxygen sensor
  • Leaking fuel injectors
  • High fuel pressure
  • Engine management system malfunction
  • Contaminated or damaged oxygen sensor

How to Fix

  1. Check the voltage and signal of the oxygen sensor
  2. Inspect fuel injectors for leaks
  3. Check the pressure in the fuel system
  4. Check sensor wiring harness and connectors
  5. Replacing the oxygen sensor if necessary

Related codes

P1151P1153P0172

Error P1152 by Vehicle Brand

BMWFordLincolnMazdaMercuryVolkswagen

FAQ

What does the P1152 code mean?

P1152 is an OBD-II diagnostic trouble code that indicates: Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Rich Bank 2

What causes a P1152 error code?

The most common causes of P1152 include: Faulty Bank 2 oxygen sensor; Leaking fuel injectors; High fuel pressure; Engine management system malfunction.

How do I fix a P1152 diagnostic trouble code?

To fix P1152: Check the voltage and signal of the oxygen sensor. Inspect fuel injectors for leaks. Check the pressure in the fuel system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1152?

Yes, but get it checked soon

How much does it cost to fix P1152?

The estimated repair cost for P1152 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

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