P1130 - FAULT CODE - OBD2

P1130 TOYOTA, LEXUS: INCORRECT AIR/FUEL RATIO SENSOR CIRCUIT/FUNCTION RANGE BANK 1 SENSOR 1.

P1130 FORD: ADAPTIVE FUEL AT LIMIT - NO HO2S SWITCH

P1130 HONDA: HEATED OXYGEN SENSOR (H02S) 2/3 - FAULTY COMPONENTS

P1130 SUBARU, SAAB: HEATED OXYGEN SENSOR (H02S) 1-OPEN CIRCUIT

P1130 MAZDA: HEATED OXYGEN SENSOR (H02S) 1, BENCH 1 - ADAPTATION LIMIT REACHED.

An Oxygen Sensor generates a voltage that varies when the amount of oxygen present in the exhaust gas changes. By using this data, the PCM (Powertrain Control Module) can make short-term fuel adjustments so that the air-fuel mixture is kept within appropriate levels for proper exhaust system performance. Although the Oxygen Sensor tells the PCM whether the mixture is rich or lean, its design cannot tell the PCM how rich or lean is the mix. With this in mind, for the PCM to maintain the ideal mixture, it must vary the Oxygen Sensor signal voltage between rich and lean continuously and several times per second, and then adjust the injector pulse width.

In contrast, an air/fuel ratio sensor is based on a voltage differential between two independent measuring elements, which makes possible a stoichiometric mixture is maintained. If the PCM observes out-of-range voltages on the A/F Sensor in the signal output circuit, the fault code P1130 OBDII will be set.

• Check Engine lighting.
• Increases fuel consumption.
• The loss of engine power is noticeable.
• When performing emission tests, they are not approved.

The reasons for setting the diagnostic code P1130 OBD2 are

• The A/F Sensor heater circuit may have bad wires or connectors.
• The heater circuit relay may be in bad condition.
• Possibly the heater of the air/fuel ratio sensor is defective.
• The system may leak.
• The engine may have vacuum leaks.

To solve the DTC code P1130 OBDII, you must take into account the following:

• As a first step, perform a TSB (Technical Service Bulletins) query.
• Using a scanner, you should check for other problem codes, especially those that indicate problems with the exhaust system or oxygen sensor. Correct these codes before the P1130.
• Check the good condition of the connectors and respective cables that are related to the A/F Sensor. Repair any of these that present wear, burn, or corrosion.
• Perform electrical checks on the Air/Fuel Ratio Sensor to ensure that it is working properly. Compare the actual values with those specified by the manufacturer and if you detect large differences, repair or replace as necessary.