Brake light will not go off, when motor is running. have replaced brake light switch and put dielectric grease on bcm connection.

these links can assist you the C0242 code is set due to the P2135 code the C0242 is set due to the computer not being able to perfomr traction control due to the P2135 code
repairing the P2135 code will correct the C0242 code
the P2135 is saying the computer sees the 2 throttle position sensors built into the throttle body do not match
this is usually cause by one of 2 things
1 ) the connection at the throttle body or possible terminal crimps inside the connector have bad connections
2 ) the throttle body itself has an internal failure
the best action to take is to pick up a tube of dielectric grease sold at most local auto parts stores and disconnect the connector at the throttle body and pack the connector with the grease then plug it back in and clear the codes and see if the problem goes away
if the problem comes back replace the throttle body connector sold at most dealers and shrink wrap in the new connector to the existing wires one at a time
if the problem still does not go away then replace the throttle body https://www.yourmechanic.com/article/p2135-obd-ii-trouble-code-throttle-pedal-position-sensor-switch-a-b-voltage-correlation-by-blake-griffin https://www.engine-codes.com/c0242.html

2007 g6 gt ????? Pontiac ? The headlamp switch is a input to the BCM - body control module , the BCM turn's the park / headlamps on .
Park, Tail and Marker Lamps
The park, tail, and marker lamps, including the license lamps, are turned ON when the headlamp switch is placed in the PARK or HEADLAMP position, or anytime the headlights are requested. The PARK LAMPS fuse in the rear fuse block supplies battery positive voltage to the PARK LAMP relay switch contacts. The PARK LAMPS fuse in the rear fuse block also supplies battery positive voltage to the PARK LAMP relay coil. When the park lamps are turned ON, the body control module (BCM) energizes the park lamp relay. Current flow is from the PARK LAMP relay to their respective park and marker lamps and to ground. Ground is provided at G101, G102, G401, and G403.

My pontiac g6 keeps showing low oil level in the dic

replace brake witch on the brake pedal

I am having this same problem. I also have a 2007 G6 but a v6 sedan. have you fiqured it out yet?

FEBRUARY 2009 -- GM is recalling 8,012 MY 2005-2006 Pontiac G6 vehicles. The brake lamps may not operate properly because of corrosion in a wiring connector. Corrosion in the connector could cause the brake lamps to illuminate when the brake pedal has not been depressed, or the lamps may not illuminate when the brake pedal is depressed. In addition, the cruise control may not engage, and greater brake pedal force may berequired to shift the vehicle out of PARK. Brake lamps that are not operating properly may not warn a driver in a following vehicle of the braking status and could lead to a crash without prior warning. Dealers will apply a dielectric lubricant to the connector to prevent corrosion. This service will be performed for you free of charge. The recall began on February 17, 2009. Owners may contact Pontiac at 1- 800-620-7668 or owner center at www.gmownercenter.com. This recall was the subject of a Preliminary Evaluation, PE08-054, conducted by the Office of Defects Investigation. 09V-036

Problem is caused by a bad connection between the body control unit and the wiring harness computer. Remove the cover panel located at the center console at the left of the front passenger footwell. The body control unit is under this panel. Unplug the blue connector from the control unit first pushing up on the grey retainer clip and then pulling the blue connector out of the socket. Smear some dielectric grease into the connector pins and replug the connector. Put everything back together. Do this with the ignition off so no power is going to the module. This should fix the problem--very common on this vehicle.

Look up above your brake pedal and you should see a switch that comes into contact with the pedal arm. Disconnect the switch and see if your brake lights are still one as the switch may have become stuck and is staying in the on mode.

CHECK YOUR BRAKE LIGHT SWITCH THAT IS ON YOUR BRAKE PEDAL UNDER THE DASH

2007 PONTIAC G6 CONVERT. BRAKE LIGHTS STAY ON WHILE DRIVING AND GO OFF WHEN PUT BRAKES ON, AND YOU CRUISE CONTROL WILL NOT WORK WHILE BRAKE LIGHTS ARE ON.