Powertrain, generic · Vehicle speed, idle control and auxiliary inputs

P0576 Cruise Control Input Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Cruise control buttons are almost always a resistor ladder on one or two signal lines, each button giving its own voltage; the module reading it (GM and Saab from about 2010: the body module; FCA: steering column module or PCM) sends the button state to the engine module over CAN. CARB names cruise control as the example of an emission-neutral diagnosis – it is simply switched off – so GM lists all these codes as type C and Ford as non-MIL: no warning lamp, the engine runs normally. P0576 means the input signal is below its lower limit – a signal shorted to ground or a shorted switch. FCA's ladder, for example, treats 0–0.216 V on signal 1 as circuit low. No manufacturer document available to us uses this code. For multi-function line A makers use P0580 instead.

Likely causes

Signal line shorted to ground
Switch shorted internally (moisture)
Module pull-up or reference faulty

Symptoms

  • Cruise control inoperative
  • Cruise control locked out
  • No check engine light, engine runs normally

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–450
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

cruise control switchclockspringswitch wiringbody control module

Related codes

P0575P0577P0580P0564

References: law.cornell.edu, static.nhtsa.gov.