B1187 Trouble Code

View B1187 obd/2 error code description and symptoms. B1187 engine photo

HO2S Sensor Circuit Malfunction (HO2S-11) During testing the HO2S Heaters are checked for opens/shorts and excessive current draw.
The test fails when current draw exceeds a calibrated limit and/or an open or short is detected. Short to VPWR in harness or HO2S. Water in harness connector. Open VPWR circuit. Open GND circuit. Low battery voltage. Corrosion or poor mating terminals and wiring Damaged HO2S heater. Damaged PCM.

As the engine heats up and combustion becomes easier and more complete, the PCM will command the idling control valve to increase the amount of air entering the engine to suit the changing conditions. However, when the load on the engine changes, say, when some electrical consumers or other systems are either turned on or off, the PCM adapts the signal voltage to the idle control valve to ensure that the idling speed remains stable, and at the RPM specified by the manufacturer.

Difficulty Level (Soso)
Level
Repair Time (30 Min.)
Time
Cost Prediction : $ 80-120

B1187 Error Code Repair Process :

If your passenger door ajar circuit short to ground check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system B1187 and engine control unit are in charge of monitoring a bunch of different passenger door ajar circuit short to ground, and if they get a reading that's a little out of whack, up pops the check engine light.

Wrench Tool B1187 is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

Common Causes of B1187

A common cause of code B1187 is the failure of Passenger Door Ajar Circuit Short To Ground, but there are several other possible causes as well, such as ;

B1187 code for all cars

You can view according B1187 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B1187 Audi A7 +B1187 Denzel Wd +B1187 Lancia Ecv +B1187 Fiat Scudo +B1187 Dort Roadster

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