Fault code P0132 – a step-by-step guide to diagnosing and fixing it

Error code P0132 is displayed and the check engine light is on - what does this mean?

The OBD/EOBD system has detected that the voltage of lambda sensor 1 in bank 1 is permanently too high. This DTC P0132 indicates a defect in the oxygen sensor system upstream of the catalytic converter. The fault code can occur with different manufacturers, although the diagnosis and repair process is basically similar.

What causes can this fault code have?

• Defective lambda sensor 1 bank 1
• Contaminated or sooted oxygen sensor
• Damaged cables or plug connections to the lambda sensor
• Short circuit in the sensor cable
• Defective engine control unit (ECU)
• Leak in the intake tract
• Dirty mass air flow sensor
• Defective fuel pressure regulator

What symptoms occur in parallel with fault code P0132?

• Increased fuel consumption: The vehicle consumes significantly more fuel than usual
• Uneven idling: The engine runs unevenly or jerks when stationary
• Loss of power: Noticeable reduction in engine power, especially when accelerating
• Black smoke: Dark exhaust fumes from the exhaust due to rich mixture
• Starting problems: The vehicle is harder to start or requires several attempts to start
• Jerking when driving: Uneven engine running while driving

How can I fix the problem with error code P0132?

• Repairing trouble code P0132 requires a systematic approach to identifying and eliminating the cause.
• Replace lambda sensor 1 bank 1 completely, as a permanently high signal usually indicates an internal defect
• Check the wiring harness and plug connections to the oxygen sensor and repair or replace if damaged
• Clean and tighten the ground connection of the lambda sensor, as poor ground leads to incorrect measured values
• Check the intake tract for leaks and replace defective hoses or seals
• Clean or replace the mass air flow sensor if it is dirty and provides incorrect values
• Test fuel pressure regulator and replace if defective to ensure correct injection pressure
• Check the engine control unit for software errors and have it reprogrammed if necessary