multiple random misfires p0304 then po306 now just showing p0300

What is your question?

I was getting code po3o4 changed coils and now showing p0300 changed plugs, wires, still showing po300 then po306 changed ICM now showing p0300 only. What is going on here ?

What makes this problem better or worse?

when car warms up

How long has your 1999 Pontiac Grand Prix had this problem?

months

Visitor

in Elk Grove CA

Feb 8, 2020

1 Reply

What are the best Pontiac repair shops?

RepairPal Certified shops can diagnose and repair your 1999 Pontiac Grand Prix. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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1 Reply

Tuffy Tire & Auto Service Center - Grandview

4.7

(85)

2.39 mi

1524 W 5th Ave

Columbus, OH

Closed

Opens 8:00 AM Tue

Call

Excite Auto Repair & Towing

4.4

(15)

5.94 mi

3430 Westerville Road

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Closed

Opens 9:00 AM Tue

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All In Auto Service

4.9

(26)

6.56 mi

5200 Fisher Road

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Opens 8:00 AM Tue

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Tuffy Tire & Auto Service - Grove City

4.4

(522)

6.67 mi

2131 Stringtown Rd

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Open

Closes 6:00 PM

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Blackstone Complete Auto Care

4.2

(37)

6.77 mi

4800 Sinclair Road

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Closed

Opens 9:00 AM Tue

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Boyd's Tire & Service - Columbus

4.7

(185)

7.23 mi

5263 Godown Rd

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Opens 8:00 AM Tue

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See All 30 Locations

Tuffy Tire & Auto Service Center - Grandview

4.7

(85)

2.39 mi

1524 W 5th Ave

Columbus, OH

Closed

Opens 8:00 AM Tue

Call