Powertrain
generic / SAE
P0661
Intake Manifold Tuning Valve Control Circuit Low Bank 1
Same as P0660 with the control line shorted to ground. The intake manifold runner control (IMRC) flaps tune intake geometry for filling efficiency across the rpm range; stuck flaps cost part-load torque and can set lean codes.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 61
Possible causes
- Control line shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–500 €
- Estimated time: 0.6–2 h
- Component: intake manifold tuning valve b1
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012