P0506 — Idle air control system — RPM lower than expected

Code P0506 is a standard OBD-II diagnostic trouble code: Idle air control system — RPM lower than expected.

In our record, P0506 is reported most often on Chevrolet, Mazda and Nissan vehicles , against powertrain and engine failure patterns , across 2005–2019 model years.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P0506 across 9 vehicle failure patterns. Diagnostic codes in complaints are reported by owners and are unverified — they point to where this code shows up, not a confirmed diagnosis. Open a page below for the full pattern (symptoms, mileage, repair costs owners cite).

Vehicles where owners report P0506 9 patterns

2019 Chevrolet Malibu

powertrain — Transmission loss of power and delayed acceleration

2019 Mazda CX-5

electrical — Transmission Jerking / Limp Mode with Misfire Codes

2017 Nissan Titan

electrical — Dead pedal and limp-mode failures—multiple error codes

2015 Chevrolet Colorado

engine — Engine stalling at stops and low-speed acceleration

2013 Hyundai Santa Fe

engine — Post-recall engine replacement issues / inadequate recall repair

2012 Volkswagen CC

powertrain — Timing chain and head gasket failure

2006 Chevrolet Malibu

cruise control — Engine Power Reduction & Throttle Control Failures

2005 Ford Five Hundred

powertrain — Engine Failsafe Mode and Throttle Body Malfunction

2005 GMC Canyon

engine — Engine Stalling (Intermittent)

Codes are pulled from what owners wrote in their NHTSA filings — they're allegations, not a shop diagnosis. Always confirm with a live scan. Browse all diagnostic codes →