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P1559

Cruise Control Power Management Mode.

  • Chrysler
  • Powertrain
  • Manufacturer code
  • Low severity

How this code is built

P
SystemPowertrain
1
Defined byThe manufacturer
5
AreaVehicle speed, idle control and auxiliary inputs
59
FaultThe specific fault in that area

What it means

P1559 on a Chrysler is defined as Cruise Control Power Management Mode. The powertrain control module has set it because it detected a condition that put cruise control into a reduced or restricted power management state. The exact trigger differs by model and engine, so confirm it against manufacturer service information for the vehicle.

Symptoms

  • Cruise control will not engage or drops out unexpectedly
  • Cruise control behaves erratically or cancels itself
  • Warning lamp may be on, or the fault may be stored without one
  • Other charging, brake switch or throttle related codes stored alongside
  • Normal driving feels unaffected apart from the cruise control

Possible causes

  • Low or unstable system voltage from a weak battery or poor charging outputlikely
  • Loose, corroded or damaged battery or earth connectionslikely
  • Fault in the brake switch or cruise control switch circuit giving implausible signalspossible
  • Wiring or connector damage on the cruise control or power management circuitspossible
  • Outdated or faulty control module software calibration (model dependent)rare
  • Internal fault in the powertrain control modulerare

How to diagnose

  1. Read all stored and pending codes and record the freeze frame data, noting any charging, brake switch or throttle codes
  2. Check battery condition and resting voltage, then charging voltage with the engine running and electrical loads on
  3. Inspect battery terminals, earth straps and the main power connections for looseness and corrosion
  4. Check the brake switch operation and the cruise control switch signals using live data
  5. Inspect the related wiring and connectors for chafing, water ingress and pin damage, and wiggle test while watching live data
  6. Look up manufacturer service information for the exact set conditions of P1559 on this model and any technical bulletins
  7. Clear the code, road test and see if it returns, confirming the conditions under which it sets

How to fix

  • Replace a weak battery or repair the charging system fault as diagnosed
  • Clean and tighten or replace corroded or damaged battery and earth connections
  • Replace a faulty brake switch or cruise control switch
  • Repair damaged wiring or connectors in the affected circuit
  • Update the control module calibration only if the manufacturer lists an outdated calibration as a known cause for this vehicle
  • Replace the powertrain control module only after all other causes are excluded and the manufacturer procedure confirms it

Can I keep driving?

Low severity

The car can normally be driven, though cruise control may be unavailable. Book it in soon, especially if there are signs of a charging or battery problem, which could leave you stranded.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.

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