Exhaust repair in Gresham, OR
All About Automotive provides exhaust system diagnosis and repair in Gresham, OR, including muffler, catalytic converter, oxygen sensor, and exhaust pipe service for all makes and models. We are a DEQ recognized repair facility. Call (503) 465-2926.
What we repair
Exhaust system services
Catalytic converter
Diagnosis, replacement, and root-cause analysis. If an upstream engine problem caused the failure, we identify and fix it first so the new converter does not fail for the same reason.
Oxygen sensors
Upstream and downstream O2 sensor diagnosis and replacement. Failed oxygen sensors affect fuel economy, engine performance, and emissions test results — and trigger the check engine light.
Muffler and pipes
Muffler replacement, exhaust pipe repair, and flex pipe repair. Oregon's wet climate accelerates rust on exhaust components. We inspect the full system and identify where the deterioration is concentrated.
Exhaust manifold
Cracked or leaking exhaust manifolds produce a ticking noise that is loudest on cold starts. Manifold leaks allow unfiltered exhaust gas to escape before the catalytic converter, affecting emissions and sensor readings.
Exhaust leaks
Pressure testing and visual inspection to locate exhaust leaks at joints, gaskets, and corroded sections. Leaks are a safety issue — carbon monoxide can enter the cabin even through small openings.
DEQ emissions repair
As a DEQ recognized repair facility, we diagnose and repair the emissions-related failures that cause vehicles to fail Oregon DEQ testing. We identify the root cause — not just the symptom — before performing repairs.
DEQ and your exhaust
Exhaust problems are the leading cause of DEQ failure
Oregon's emissions testing program checks for hydrocarbons, carbon monoxide, and oxides of nitrogen in your exhaust. It also checks for active diagnostic trouble codes and whether your vehicle's onboard monitoring systems have run their self-tests. A failed catalytic converter, a misfiring engine, or a faulty oxygen sensor can cause a DEQ failure even if no warning light is on.
As a DEQ Too recognized facility, we diagnose the actual cause of emissions failures — not just clear the codes and hope for the best. A vehicle that passes DEQ after a proper repair stays passing. One that passes after a code clear usually fails again at the next test.
DEQ failure repair guide →Common questions
Exhaust FAQ
Is it safe to drive with a leaking exhaust?
No. An exhaust leak — even a small one — can allow carbon monoxide to enter the passenger cabin. Carbon monoxide is odorless, colorless, and dangerous at low concentrations. If you hear a ticking, hissing, or rumbling noise that is louder than usual, especially on cold starts or at idle, have the exhaust inspected promptly. Do not drive with the windows up until the system is inspected.
What does a catalytic converter do and how long does it last?
The catalytic converter converts harmful exhaust gases — hydrocarbons, carbon monoxide, and nitrogen oxides — into less harmful compounds before they leave the tailpipe. It also plays a direct role in passing Oregon DEQ emissions testing. Most catalytic converters last the life of the vehicle with normal use. Premature failure is often caused by oil or coolant contamination from an engine problem upstream. If your catalytic converter fails, we diagnose the root cause first so the replacement does not fail for the same reason.
What causes a car to fail an Oregon DEQ emissions test?
Common causes include a faulty oxygen sensor, a failed catalytic converter, a misfiring engine, a loose or missing gas cap, or unresolved diagnostic trouble codes (the check engine light). As a DEQ recognized repair facility, we diagnose the root cause of emissions failures and perform the repairs that will allow the vehicle to pass retest. We do not guess at emissions problems — we scan the vehicle, test the oxygen sensors and catalyst efficiency, and identify what is actually causing the failure.
My car is louder than it used to be — is that the exhaust?
Often, yes. Exhaust components rust from the inside out, especially on vehicles driven in wet climates. A louder exhaust, a rumbling or rattling sound under the vehicle, or a smell of exhaust fumes inside the car with the windows up are all signs the exhaust system needs attention. We inspect the full exhaust — from the manifold to the tailpipe — and identify which component is the source so you get a targeted repair, not a guess.
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