2002 Pontiac Bonneville Cruise Control

JOHNBOULET

MEMBER
2002 PONTIAC BONNEVILLE
6 CYL
FWD
AUTOMATIC
70,000 MILES

Unintended acceleration at highway speeds when cruise control is on. If I apply gentle pressure on accelerator pedal (passing on Interstate) when cruise control is set, car continues to accelerate after I "let up" on the pedal. I have to tap the brake to stop acceleration. Is the cruise control "module" defective? [Module was replaced 3 years ago after cruise control failed completely]

Sunday, January 11th, 2009 AT 12:06 AM

1 Reply

BLUELIGHTNIN6

MECHANIC
16,542 POSTS

Inspect the following before replacing the module :
-Proper operation of brake lamps
-Throttle linkage for mechanical binding which could cause the system to malfunction
-Cruise control cable adjustment, should have minimum slack
-If DTCs (Diagnostic Trouble Codes) are stored, scan with diagnostic tool
-EMI on speed sensor signal circuit may cause erratic cruise control operation

Post results of the inspections and I will follow up.

Thanks for using 2carpros. Com!

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Sunday, January 11th, 2009 AT 12:23 AM