B3420 Trouble Code

View B3420 obd/2 error code description and symptoms. B3420 engine photo

Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code B3420, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code B3420 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.

Difficulty Level (Soso)
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Repair Time (50 Min.)
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Cost Prediction : $ 40-75

B3420 Error Code Repair Process :

If your egrchk solenoid circuit malfunction 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 B3420 and engine control unit are in charge of monitoring a bunch of different egrchk solenoid circuit malfunction, and if they get a reading that's a little out of whack, up pops the check engine light.

Wrench Tool B3420 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 B3420

A common cause of code B3420 is the failure of EGRCHK Solenoid Circuit Malfunction, but there are several other possible causes as well, such as ;

B3420 code for all cars

You can view according B3420 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B3420 Audi 4000 +B3420 Chevrolet Equinox 3 +B3420 Paramount 1.5-litre +B3420 Ford V-8 +B3420 Volvo Volvo

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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