P1153 TOYOTA Possible Causes
- Faulty air/fuel ratio sensor, bank 2 sensor 1
- Air/fuel ratio sensor, bank 2 sensor 1 harness is open or shorted
- Air/fuel ratio sensor, bank 2 sensor 1 circuit, poor electrical connection
How to Fix Code P1153 TOYOTA?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine warning light soon service)
P1153 TOYOTA Meaning
The air-fuel ratio (A/F) sensor varies its output voltage proportionally to the air-fuel ratio. Based on the output voltage, the engine control module (ECM) determines whether the air-fuel ratio is RICH or LEAN and adjusts the stoichiometric air-fuel ratio. The ECM also checks the fuel injection volume compensation value to verify whether the A/F sensor is deteriorating or not. The deterioration of the A/F sensor response is determined by the ratio between the A/F sensor output voltage change and the fuel compensation change.