---
title: "Otto Ammer — Clean Truck Check, Mercer, PA | CTC Finder"
description: "Otto Ammer in Mercer, PA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/otto-ammer-mercer-pa/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Otto Ammer

Clean Truck Check tester in Mercer, PA.

> CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester.

| Field | Value |
|---|---|
| Location | Mercer, PA 16137 |
| Phone | (724) 301-6104 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Otto Ammer can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Airlimits - Youngstown in Youngstown, about 29 miles away. [See listing](https://ctcfinder.com/tester/airlimits-youngstown-youngstown-oh/).

## Clean Truck Check testers in Pennsylvania

Otto Ammer is one of 16 testing businesses in Pennsylvania on CARB's public tester list. 10 of them offer mobile testing and 4 do smoke opacity tests.

## When your truck is due

Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/

## Frequently asked questions

### Does Otto Ammer offer mobile Clean Truck Check testing?

Yes. Otto Ammer says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

### Can Otto Ammer test a 2012 or older diesel truck?

Otto Ammer does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Airlimits - Youngstown](https://ctcfinder.com/tester/airlimits-youngstown-youngstown-oh/) (about 29 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Otto Ammer charge for a Clean Truck Check?

Otto Ammer has not published prices with us; call (724) 301-6104 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the [cost guide](https://ctcfinder.com/guide/cost/).

### Is Otto Ammer a CARB-credentialed tester?

Otto Ammer appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

## Other testers nearby

- **[Bilge Ekinci](https://ctcfinder.com/tester/bilge-ekinci-hermitage-pa/)** — Hermitage, PA 16148 — (516) 329-4779 — 9 mi. Services: mobile testing, OBD testing, motorhome testing.