P200B – Intake Manifold Runner Performance (Bank 2)

What Does P200B Mean?

P200B is a generic OBD-II diagnostic trouble code that stands for "Intake Manifold Runner Performance (Bank 2)". It indicates that the powertrain control module (PCM) has detected a problem with the intake manifold runner control (IMRC) system on bank 2 of the engine (the side that does not contain cylinder #1).

Severity and Driving with P200B

A stored P200B code will typically cause the intake manifold flaps to remain fully open. While not severely urgent, it's best to diagnose and repair this issue at the earliest convenience to restore optimal engine performance. Driving with a P200B is possible but may result in reduced fuel efficiency, diminished engine performance (especially at lower RPMs), and potential lean or rich running conditions.

Technical Details and Affected Parts

The IMRC system is designed to optimize air flow into the engine by adjusting the position of flaps inside the intake manifold runners. At low RPMs, the flaps close to limit airflow and reduce emissions. At higher RPMs, the flaps open to maximize airflow and engine performance.

Key components of the IMRC system that can trigger a P200B code include:

• IMRC actuators (vacuum-operated or electronic)
• Intake manifold runner flaps and linkages
• Vacuum lines and check valves
• IMRC position sensors
• PCM and wiring harnesses

While P200B is a generic code applicable to all OBD-II vehicles (1996+), the exact configuration of the IMRC system varies by make and model. Refer to vehicle-specific service information for precise details.

Common Causes of P200B

Potential causes of a P200B code include:

• Faulty IMRC actuator(s)
• Broken/stuck intake runner flaps or linkages
• Leaking or collapsed vacuum lines
• Malfunctioning IMRC position sensor(s)
• Wiring issues (open/shorted circuits, poor connections)
• Faulty PCM (rare)

Diagnosing P200B Step-by-Step

1. Scan for codes. Address any related intake/sensor codes first (e.g. MAF, MAP, IAT).

2. Visually inspect IMRC components:

   • Check linkages and bushings for damage/wear
   • Examine vacuum lines for leaks, kinks, cracks
   • Verify electrical connections are secure; inspect wiring for damage

3. With a scan tool, command IMRC flaps open/closed and verify proper operation.

4. Test IMRC position sensors (if equipped) and compare readings to specs.

5. Check vacuum supply to IMRC actuators; test actuators using a hand vacuum pump.

6. If no vacuum/mechanical issues found, use a DVOM to test IMRC circuits for opens/shorts.

7. If all components test okay, suspect a faulty PCM as a last resort.

Repairing P200B and Costs

Repairs for a P200B code may include:

• Replacing IMRC actuator(s): $120-$500 USD / €110-€450 EUR
• Intake manifold runner flap replacement: $400-$1200 USD / €360-€1100 EUR
• Fixing vacuum leaks: $20-$50 USD / €18-€45 EUR
• Wiring harness repairs: $100-$400 USD / €90-€360 EUR

Exact repair costs depend on vehicle make/model and local labor rates. Consult repair manuals for detailed replacement procedures and torque specs.

Preventing P200B Issues

Proactive maintenance can help avoid P200B problems:

• Change engine air filters every 20,000-25,000 miles (32,000-40,000 km)
• Inspect and replace vacuum lines every 60,000 miles (96,000 km)
• Address oil leaks promptly to avoid contaminating IMRC components
• Use OEM or high-quality aftermarket replacement parts

Related Codes and Issues

Other codes that may appear alongside P200B include:

• P2008 – Intake Manifold Runner Control Circuit/Open Bank 1
• P2009 – Intake Manifold Runner Control Circuit Low Bank 1
• P2023 – Intake Manifold Runner Position Sensor/Switch Circuit Bank 2
• Lean/rich codes (e.g. P0171, P0172)
• Misfire codes (e.g. P0300-P0308)

When diagnosing P200B, be sure to thoroughly inspect the entire IMRC system, as multiple issues can occur simultaneously. With proper diagnosis and repair, vehicles can be restored to peak efficiency and performance.

Frequently Asked Questions About P200B

What does code P200B mean?

P200B indicates that the Powertrain Control Module (PCM) has detected an issue with the Intake Manifold Runner Control (IMRC) system performance on bank 2 of the engine.

How serious is the P200B code?

While not immediately critical, P200B should be addressed promptly as it can lead to reduced engine performance and fuel efficiency.

Can I continue driving with code P200B?

You can drive short distances, but it’s recommended to have the issue diagnosed and repaired soon to prevent potential engine damage.

What are the common symptoms of P200B?

Symptoms may include reduced engine power, decreased fuel efficiency, rough idling, and an illuminated check engine light.

What causes the P200B code?

Common causes include faulty IMRC actuators, damaged intake runner flaps, vacuum leaks, wiring issues, or a malfunctioning PCM.

How is P200B diagnosed?

Diagnosis involves visual inspection, scanning for related codes, testing IMRC components, and checking electrical connections and vacuum lines.

What parts are typically involved in a P200B issue?

Key components include IMRC actuators, intake manifold runner flaps, vacuum lines, position sensors, and related wiring.

Is P200B a generic or manufacturer-specific code?

P200B is a generic OBD-II code applicable to various vehicle makes and models.

How much does it cost to repair a P200B issue?

Repair costs can range from $100 to $1200 USD, depending on the specific cause and required parts.

Can P200B cause damage to my engine if left unaddressed?

Yes, prolonged issues with the IMRC system can potentially lead to increased wear on engine components and reduced performance.

How can I prevent P200B from occurring?

Regular maintenance, including air filter changes and inspection of vacuum lines, can help prevent IMRC system issues.

Are there any related codes to P200B?

Yes, related codes include P2008, P2009, and P2023, which also pertain to intake manifold runner control issues.

What’s the difference between P200A and P200B?

P200A refers to intake manifold runner performance issues on bank 1, while P200B pertains to bank 2.

Can a P200B code clear itself?

While it’s possible for the code to clear if the issue resolves temporarily, it’s likely to return if the underlying problem isn’t fixed.

What tools are needed to diagnose P200B?

Diagnostic tools include an OBD-II scanner, multimeter, vacuum pump, and potentially specialized tools for accessing the IMRC system.

How long does it typically take to repair a P200B issue?

Repair time can vary from 1-4 hours, depending on the specific cause and vehicle model.

Can a P200B code be caused by low-quality fuel?

While unlikely, contaminated fuel could potentially cause IMRC system issues. However, mechanical or electrical problems are more common causes.

Is it safe to clear the P200B code without fixing the issue?

Clearing the code without addressing the underlying problem is not recommended, as it may mask a potentially serious issue.

Can cold weather trigger a P200B code?

Extreme cold could potentially affect IMRC system components, but it’s not a common cause of P200B.

Will a P200B code affect my vehicle’s emissions test?

Yes, an active P200B code will likely cause your vehicle to fail an emissions test, as it indicates a problem with the engine’s air intake system.