2002 chevy impala a crank sensor code keeps popping up after replacing both of them the car runs fine but will not pass emissions because code keeps coming back on. After clearing the code i can drive the car all without it on until I shut the car off and restart then it comes back on

SOURCE: Coolant Temp Sensor 03 Malibu

coolant sensor maybe 19 mm key its near the upper radiator hose in the engine thanks pierre

SOURCE: 2002 chevy impala o2 location?

it is locared on the driver side on top of the transmision

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It's should be a simple remove and replace. Just make sure the engine is off. Also do not touch any of the filament wires on the sensor, just the plastic housing. Also after you install it drive the car for a little while (city speeds, cruising speeds and inbetween). That way the computer will be able to readjust its setting since it is a new sensor.

SOURCE: Mitsubishi Galant 2002 will not start

Glad I can help. :)

Tech jk

• 102 Answers
• Posted on May 08, 2009

SOURCE: on a 2006 chevy impala it tells you to tighten the gas cap

There is no sensor for a loose gas cap. What is happening is that the evaporative emission system is sensing a "Large Leak". Usually code p0455. The computer sees this as the most probable cause is a loose gas cap depending on several factors it looks at. You would need to clear the code(s) and see if that was the problem. If the light comes back on, then you have a problem in the system that will not let it seal. Possible solenoid problem, leaking hose / line, etc.