OBD-II code · Powertrain (generic, extended)
P20F8 Intake Manifold Runner Control Circuit Performance (Bank 1)
The IMRC actuator drive circuit on bank 1 is electrically OK but its current draw or duty-cycle response is outside the calibrated profile — typically a high-resistance solenoid winding or a partially shorted driver.
Is it safe to drive with P20F8?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySolenoid winding ageing — resistance climbing
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Imrc Actuator, Imrc Harness
Related codes
- P20F9Intake Manifold Runner Control Circuit Performance (Bank 2)
- P20F5Reductant Consumption Too High
- P20F6Reductant Injection Valve Stuck Open (Bank 1 Unit 1)
- P20F7Reductant Injection Valve Stuck Open (Bank 2 Unit 1)
- P20FAReductant Pump B Control Circuit/Open
- P20FBReductant Pump B Control Performance/Stuck Off
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.