Check Engine Light & Diagnostics in Petaluma
Check engine light on? Strange noise or vibration? We'll find the real problem -- not just clear the code.
A check engine light can mean a lot of things, from a loose gas cap to a real mechanical issue -- and the code itself only points at where to start looking, not what's actually wrong. We diagnose the root cause before recommending a repair, rather than replacing parts based on a guess.
When to bring it in
- The check engine light is on, steady or flashing
- A new noise, knock, or ticking from the engine
- Vibration that wasn't there before
- Rough idling, stalling, or hesitation when accelerating
- The car won't start, or is slow to start
What we do
- Full check engine light diagnosis, not just a code pull
- General engine diagnosis and repair
- No-start diagnosis
- Noise and vibration diagnosis
- Honest options -- repair, monitor, or replace
A flashing check engine light means stop driving and get it looked at -- it can point to a misfire that damages the catalytic converter if it's ignored. A steady light is less urgent but still worth a real diagnosis rather than guessing.
Frequently Asked Questions
What does it mean if my check engine light is on?
Could be almost anything, from a loose gas cap to a real mechanical problem -- the code is a starting point, not a diagnosis. We read it and actually trace the cause before recommending anything.
Is it safe to keep driving with the check engine light on?
If it's steady, usually yes for a short while, though it's worth getting looked at soon. If it's flashing, stop driving and get it in -- that usually means an active misfire, which can damage your catalytic converter fast.
How much does a diagnostic cost?
Depends on what we find and how deep we have to dig. We'll tell you the diagnostic cost upfront before we start, and what we find determines the repair quote after.
Will you just clear the code without fixing anything?
No -- clearing a code without fixing the cause just delays the light coming back on, sometimes with a bigger problem behind it by then. We diagnose the real issue first.
My car has a new noise or vibration but no warning light -- should I still bring it in?
Yes. Plenty of real problems don't trigger a warning light right away. A new noise or vibration is worth a look before it becomes something bigger.