OBD-II code · Powertrain (generic, extended)
P218A Throttle Actuator B Control System - Idle Position Not Learned
Throttle Actuator B Control System - Idle Position Not Learned: the control module has detected this fault condition.
Is it safe to drive with P218A?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIdle relearn procedure not completed
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.2–1 h
- Emissions test
- Likely to fail
- Parts involved
- Throttle Actuator B
Related codes
- P2176Throttle Actuator A Control System - Idle Position Not Learned
- P2187System Too Lean at Idle (Bank 1)
- P2188System Too Rich at Idle (Bank 1)
- P2189System Too Lean at Idle (Bank 2)
- P218BThrottle/Fuel Inhibit B Circuit
- P218CThrottle/Fuel Inhibit B Circuit Range/Performance
- P218DThrottle/Fuel Inhibit B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.