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1999 Pontiac Grand Prix GTR P0607 Code: Causes and Fixes for Low Coolant Warning and Stalling

Model: 1999 Pontiac Grand Prix GTR Fault Code: P0607 Posted: 2015-07-17 11:42

I'm experiencing a P0607 diagnostic code on my 1999 Pontiac Grand Prix GTR 4-door supercharged model. The vehicle runs smoothly when cold but begins to show a 'low coolant level' warning light after warming up, eventually leading to stalling. I've checked the coolant level and it consistently reads full; additionally, I recently replaced the water pump with a new one. Despite these efforts, the issue persists. What could be causing this P0607 code? Are there any reliable diagnostic steps or repairs that can resolve this problem in a 1999 Pontiac Grand Prix GTR?

Related fault codes
P0607
Comments (1)
Anonymous 2015-07-17 12:10

P0607 on GM vehicles typically indicates a problem with the Powertrain Control Module (PCM), often pointing to a faulty PCM unit. It's recommended to use only original GM parts—aftermarket components may not be compatible or reliable and can cause recurring issues.