Honda
Cold start idle air control system performance problem. Idle not reaching target during warm-up; often a dirty throttle body.
P050A fault code: what it means
P050A: Cold start idle air control system performance problem. Idle not reaching target during warm-up; often a dirty throttle body.
Usual causes, most likely first
- dirty throttle body
- intake air leak
- idle relearn needed
P050A by make
Nissan
Cold start control fault: the ECM could not raise idle or retard timing as planned while the catalyst warms up. Usually low air flow or fuelling.
Subaru
Cold start idle air control performance: idle not as specified while warming up.
What the repair usually costs
- Throttle body clean and idle relearnNZ$90–NZ$190 · A$100–A$200
- Electronic throttle body replaceNZ$470–NZ$1,290 · A$440–A$1,190
- Glow plugs (diesel, set of 4)NZ$250–NZ$850 · A$250–A$850
Not sure what P050A means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.