P1130 TOYOTA Possible Causes
- Faulty air/fuel ratio (A/F) sensor, bank 1 sensor 1
- Air-fuel ratio (A/F) sensor, bank 1 sensor 1 harness is open or shorted
- Air-fuel ratio (A/F) sensor, bank 1 sensor 1 circuit, poor electrical connection
- Fuel pressure
- Fuel injector
- Intake air leaks
How to Fix Code P1130 TOYOTA?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
When is the Code Detected?
Code 1130 is set when the A/F sensor output voltage change value is not what the engine control module (ECM) expects.
Possible Symptoms
- Engine light on (or service engine soon warning light)
P1130 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.