Computer Diagnostics
Check engine light on? We read the codes, test what they point to, and find the actual cause. You see photos of what we found before any repair.
The check engine light comes on when your engine computer sees something outside its normal range and stores a trouble code. It can be something as small as a loose gas cap or as serious as an engine misfire.
A steady light means get it checked soon. A flashing light usually means the engine is misfiring badly enough to overheat the catalytic converter, which is an expensive part to replace. If it's flashing, ease off, avoid hard acceleration and get it in as soon as you can.
We read the codes and the live data, then test the parts the codes point to. A code tells us where to look, not always which part failed, so we confirm the cause before recommending a repair. Then you get photos and videos of what we found and a clear estimate. Nothing gets done until you approve it.
Recent work
Kemah · November 2026 · From our shop records
The EVAP purge valve and vent solenoid were not sealing and the rear fuel filler cap was leaking, so we replaced all three. A driver brought their vehicle into our Kemah shop at 107,000 miles because the check engine light was on. Our tech pulled codes P0442 and P0455, a small and a large evap leak. Leaks like these can keep the check engine light on.
Kemah · November 2026 · From our shop records
The EVAP purge valve was sticking open, so we replaced the EVAP purge control solenoid. Hesitation or stalling, poor fuel economy and a fuel smell sent a driver to our Kemah shop with their vehicle at 112,000 miles, and the check engine light had come on that week and stayed on solid. A scan of the engine computer showed code P0496, EVAP system high purge flow during a non-purge condition. Further testing showed the stuck valve let fuel vapors from the tank into the intake manifold when the system was not asking for a purge. Our inspection also found the engine computer was running an outdated software calibration.
Need check engine light? Bring it to our Kemah shop.
4.9 stars from 532 Google reviews
Recent check engine light work nearby
1 check engine light job for Bacliff drivers in the last 90 days, about 3 miles from our Kemah shop.
Oct 2026
The EVAP purge valve was aftermarket and not sealing properly, so we replaced the EVAP purge control solenoid.
1 check engine light job for League City drivers in the last 90 days, about 4 miles from our Kemah shop.
A loose or worn gas cap can set the light. Tighten it and give it a few drives. If the light stays on, bring it in.
Usually a bad misfire. Ease off and get it in soon, since it can damage the catalytic converter.
Often a misfire from a spark plug, an ignition coil or a fuel injector.
Can point to an oxygen sensor, a mass airflow sensor or another problem with how the engine mixes fuel and air.
A lit check engine light usually means the vehicle won't pass until the cause is fixed.
Reviews
4.9 stars on Google from 532 reviews as of November 2026
“Had Jeeps oil changed and a o2 sensor installed that was causing weird hesitation. Code popped up when they did diagnostics. Running great again and will order a fuel line rail heat guard when driving it in hot temps this Summer. Didn't know it was a issue but makes sense. 5 stars!”
“My van has been through the ringer in the last month. It needed some immediate attention with the check engine light on. Texas complete auto Repair came in clutch. I highly recommend this new business at Anders and 518. Not only did they complete the work at a fair price, but in an extremely timely manner, open on weekends, free car wash with every service. But when I was going to Uber to pick up my van they sent someone to come get me-on a Sunday morning!!!!!!!”
Where we work
4.9(532) as of Nov 20264.9 out of 5, from 532 Google reviews, as of November 2026
916 FM 518 East
Mon to Fri, 8:00 AM to 6:00 PM; Sat, 8:00 AM to 5:00 PM; Sun, closed
Related services
Explore our other computer diagnostics services.
FAQ
Common questions about our check engine light services.
Still have questions?
Call (281) 549-4391Free shuttle, loaner cars available
Early bird and after hours drop off
Up to 36 month / 36,000 mile warranty
On most repairs, nationwide through TechNet
4.9 stars on Google
From 532 Google reviews
