Fuel and air

P2008 — Intake Manifold Runner Control Circuit Open (Bank 1)

Severity: medium Safe to drive

What P2008 means

The engine control module operates flaps in the intake manifold through an electric actuator or solenoid. These flaps change the length or size of the intake passages so the engine pulls well at both low and high rpm. P2008 sets when the ECM sees an open circuit in the bank 1 runner control circuit, meaning its command is not reaching the actuator.

Symptoms

  • Check Engine light on
  • Weak acceleration
  • Loss of power at low or high rpm
  • Rough idle
  • Reduced fuel economy

Possible causes

  1. Broken wire or poor connection in the harness
  2. Actuator connector unplugged or not latched after intake work
  3. Failed runner actuator (motor or solenoid)
  4. Corroded or damaged connector terminals
  5. Faulty engine control module (rare)

How to diagnose

  1. Read all codes and freeze frame data, clear the code, and see if it returns
  2. Inspect the actuator connector for a secure latch, corrosion and bent pins
  3. Inspect the harness near the intake manifold for chafing, kinks and past repairs
  4. Check for power and ground at the connector using the vehicle wiring diagram
  5. Test the control wires for continuity from the actuator to the ECM
  6. Measure actuator or solenoid resistance and compare with spec
  7. Command the actuator with a scan tool and watch whether the flaps move
  8. Check the flaps and linkage for binding or sticking

Common fixes

  • Reconnect and latch the connector, and clean the terminals
  • Repair the broken wire or replace the damaged harness section
  • Replace the runner actuator or solenoid
  • Replace or clean the runner assembly if the flaps bind
  • Clear the code and confirm it does not return

P2008 on different brands

Ford · manuals
On Ford, P2008:01 refers to the IMRC (intake manifold runner control) control circuit; it identifies the condition the monitor detected rather than a confirmed failed part.

Questions and answers

What does P2008 mean?

It means an open circuit in the bank 1 intake manifold runner control circuit. The ECM cannot properly control the flap actuator, so the flaps may not move as intended.

Can I drive with P2008?

Usually yes, though you may notice weak power and worse fuel economy. Have it diagnosed soon.

What should I check first?

The actuator connector and wiring, especially if the intake was recently serviced. An unlatched connector or damaged wire is a common cause.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.