OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P0661?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl line shorted to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–2 h
- Emissions test
- Likely to fail
- Parts involved
- Intake Manifold Tuning Valve B1
Related codes
- P0664Intake Manifold Tuning Valve Control Circuit Low Bank 2
- P065EIntake Manifold Tuning Valve Performance Bank 1
- P065FIntake Manifold Tuning Valve Performance Bank 2
- P0660Intake Manifold Tuning Valve Control Circuit Open Bank 1
- P0662Intake Manifold Tuning Valve Control Circuit High Bank 1
- P0663Intake Manifold Tuning Valve Control Circuit Open Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.