B0859 Trouble Code

View B0859 obd/2 error code description and symptoms. B0859 engine photo

Mass Air Flow (MAF) Sensor Intermittent The MAF sensor circuit is monitored by the PCM for sudden voltage (or air flow) input change through the comprehensive component monitor (CCM). If during the last 40 warm-up cycles in key ON engine running the PCM detects a voltage (or air flow) change beyond the minimum or maximum calibrated limit, a continuous memory diagnostic trouble code (DTC) is stored.

A good starting point in your diagnosis is checking all system fuses and fusible links. This can be done using the DVOM on the voltage setting. You will want to test the fuses with circuits loaded. Some fuses will appear normal until a load is placed on their respective circuit; at which point they will fail. This has been the cause of many 'phantom malfunctions'. Consult your vehicle information source for fuse and fusible link locations. If all fuses are in working order, you may want to check TCM relay operation by swapping identical relays. Usually the horn relay, starter relay, fuel pump relay, air conditioning clutch relay, and controller relays are similar enough in design to swap for diagnostic purposes.

Difficulty Level (Expert)
Level
Repair Time (60 Min.)
Time
Cost Prediction : $ 80-170

B0859 Error Code Repair Process :

The rule of B0859 code when it comes to emissions-related vehicle repair is that any modification that changes the vehicle from a certified configuration to a non-certified configuration is considered tampering: this applies to both vehicle owners and repair facilities and is, therefore, a Federal offense. Replacing a catalyst with a straight pipe is one traditional example of fuel pump resistor switch circuit malfunction. Likewise, overriding the OBD B0859 error in system through the use of high-tech defeat devices or non-certified computer chips, for example, would also be considered tampering. The OBD system may, however, be repaired back to its original certified configuration with certified performance chips or appropriate aftermarket parts.

Wrench Tool B0859 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 B0859

A common cause of code B0859 is the failure of Fuel Pump Resistor Switch Circuit Malfunction, but there are several other possible causes as well, such as ;

B0859 code for all cars

You can view according B0859 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B0859 Hotchkiss Anjou +B0859 Caterham Superlight +B0859 Ford Ka +B0859 Frazer Nash Shelsley +B0859 Datsun Deluxe

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