P2638 — Torque management feedback signal "A"

Code P2638 is a standard OBD-II diagnostic trouble code: Torque management feedback signal "A".

In our record, P2638 is reported most often on Acura, Jeep and Honda vehicles , against powertrain failure patterns , across 2013–2017 model years.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P2638 across 5 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 P2638 5 patterns

2017 Acura MDX

powertrain — Auto start/stop malfunction causing unintended Park shift

2016 Acura MDX

powertrain — Transmission hesitation, lag, and erratic shifting

2016 Honda Pilot

powertrain — Engine misfiring, rough idle, and stalling

2016 Jeep Wrangler

powertrain — Engine stalling under normal operation

2013 Jeep Wrangler

powertrain — Loss of power and limp mode during highway driving

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 →