---
title: "Daddy Earl's Auto Repair — Clean Truck Check, Corona, CA"
description: "Daddy Earl's Auto Repair in Corona, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and…"
url: "https://ctcfinder.com/tester/daddy-earls-auto-repair-corona/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Daddy Earl's Auto Repair

Clean Truck Check tester in Corona, CA (Riverside County).

> 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 | 21785 Temescal Canyon Rd, Corona, CA 92883 |
| County | Riverside County |
| Phone | (951) 805-9287 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Daddy Earl's Auto Repair 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 Sikteenth Diesel Repair & Diagnostics in Corona, about 7 miles away. [See listing](https://ctcfinder.com/tester/sikteenth-diesel-repair-and-diagnostics-corona/).

## Clean Truck Check testers in Riverside County

Daddy Earl's Auto Repair is one of 251 testing businesses in Riverside County on CARB's public tester list. 233 of them offer mobile testing and 102 do smoke opacity tests. In Corona itself there are 18 listed businesses, 17 of them mobile.

## 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 Daddy Earl's Auto Repair offer mobile Clean Truck Check testing?

Yes. Daddy Earl's Auto Repair 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 Daddy Earl's Auto Repair test a 2012 or older diesel truck?

Daddy Earl's Auto Repair does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Sikteenth Diesel Repair & Diagnostics](https://ctcfinder.com/tester/sikteenth-diesel-repair-and-diagnostics-corona/) (about 7 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Daddy Earl's Auto Repair charge for a Clean Truck Check?

Daddy Earl's Auto Repair has not published prices with us; call (951) 805-9287 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 Daddy Earl's Auto Repair a CARB-credentialed tester?

Daddy Earl's Auto Repair 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

- **[Clean Truck Check by Bison](https://ctcfinder.com/tester/clean-truck-check-by-bison-corona/)** — 11079 Evergreen Loop, Corona, CA 92883 — (909) 717-3322 — 1 mi. Services: mobile testing, OBD testing.
- **[Trevor Harrison](https://ctcfinder.com/tester/trevor-harrison-corona/)** — Corona, CA 92883 — (909) 202-9386 — 1 mi. Services: mobile testing, OBD testing.
- **[Angel Rangel](https://ctcfinder.com/tester/angel-rangel-corona/)** — Corona, CA 92881 — (714) 341-5493 — 7 mi. Services: not listed.
- **[Jawid Hussaini](https://ctcfinder.com/tester/jawid-hussaini-corona/)** — Corona, CA 92881 — (909) 450-1394 — 7 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Sikteenth Diesel Repair & Diagnostics](https://ctcfinder.com/tester/sikteenth-diesel-repair-and-diagnostics-corona/)** — 19142 Consul Ave, Corona, CA 92881 — (213) 663-8429 — 7 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Godofredo Valencia](https://ctcfinder.com/tester/godofredo-valencia-corona/)** — Corona, CA 92878 — (951) 818-8605 — 9 mi. Services: mobile testing, OBD testing.