P0085 Code – What Does It Mean & How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.

Causes

The P0085 DTC code may have a number of possible reasons, including:

• Exhaust valve control solenoid malfunction: This might cause a high voltage situation if the solenoid has internal electrical problems or is stuck in the open position.
• Wiring or connection issues: Corroded terminals, damaged wiring, or loose connections can all affect the electrical circuit and result in excessive voltage.
• Engine control module (ECM) malfunction: An ECM that isn't working properly may send the solenoid the wrong signals or too much voltage.
• Short to power or ground: In the exhaust valve control solenoid circuit, a short circuit to power or ground might result in a high voltage situation.

Symptoms

The P0085 error code may be accompanied by a number of typical symptoms, including:

• Illuminated Check Engine Light (CEL): The most apparent sign of trouble is the illumination of the CEL on the vehicle's dashboard.
• Reduced engine performance: The vehicle may experience reduced power and overall performance.
• Poor fuel economy: The reduced airflow brought on by the high voltage state may result in poorer fuel economy.
• Uneven engine operation or erratic idle speed: This is referred to as rough idling.

Diagnosis

It is advised to carry out the following actions in order to correctly diagnose the P0085 code:

• OBD-II scanner: Use an OBD-II scanner to retrieve the specific code and any related codes.
• Visual inspection: Conduct a thorough inspection of the exhaust valve control solenoid, wiring, and connectors to identify any visible issues or damage.
• Testing the exhaust valve control solenoid: Use a multimeter to measure the resistance and voltage of the solenoid.
• Inspecting the wiring and connections: Check for damaged wiring, loose connections, or corroded terminals.
• Testing the ECM: If required, run tests to ensure the ECM is operational.

Common mistakes

The following typical errors should be avoided while diagnosing and fixing the P0085 code:

• Ignoring pertinent codes: Examine and fix any further relevant codes that may be a factor in the problem.
• Insufficient visual examination: Make sure you do a complete inspection of the wiring, connections, and other parts for any obvious issues.
• Failing to address root causes: Simply clearing the code without resolving the underlying issue can lead to recurring problems.

How serious is this?

Depending on the vehicles and their particular characteristics, the extent of the P0085 code may vary. It is not appropriate to ignore this issue, while the vehicle may still be in operation. Damage to the engine, reduced performance, and increased emissions may result from the prolonged operation of a defective exhaust valve control solenoid.

What repairs can fix the code?

It could be essential to make the following repairs to fix the P0085 code:

• Replacing the exhaust valve control solenoid: If the solenoid is faulty or stuck in the open position, it should be replaced.
• Repairing or replacing damaged wiring or connectors: Any issues with the wiring or connections must be addressed.
• Checking for short circuits: Inspect the exhaust valve control solenoid circuit for any short circuits to power or ground and repair them as necessary.
• ECM replacement or repair: If the ECM isn't working properly, it may need to be fixed.

Related codes

Some related codes that may be associated with the P0085 DTC code include:

• P0075: Intake Valve Control Solenoid Circuit Bank 1
• P0076: Intake Valve Control Solenoid Circuit Low Bank 1
• P0077: Intake Valve Control Solenoid Circuit High Bank 1
• P0082: Intake Valve Control Solenoid Circuit High Bank 2

Conclusion

The high voltage condition of the solenoid control circuit for bank 2's exhaust valve is shown by DTC code P0085. In order to prevent further engine damage and maintain optimal vehicle performance, the correction of that code must be carried out as soon as possible. You can solve the problem and revive your vehicle's functioning with an accurate diagnosis and proper repair.

If the P0085 DTC Code is incorrectly diagnosed or repaired, contact a professional technician immediately.