Codes P0355 and code P0357, check engine light?

PETPARENT

MEMBER
2004 MERCURY GRAND MARQUIS
4.6L
V8
4WD
AUTOMATIC
247,200 MILES

Computer was giving me codes p0355 and code p0357. I replaced the coil packs on all 8 cylinders. Car was still giving me those codes. I checked to make sure that all 8 plugs were tight in the cylinder head which they wer. Previously I had used a spark plug insert on cylinder 7. Do you think that I need to use a longer insert on cylinder 7? Car now gives me p 1336 and P0128, Car also sprays fuel on th passenger side of the engine and it runs very rough. All of the injectors apear to be tight. Should I replace the thermostat and the coolant temperature sensor as well as either or both Crankshaft and camshaft sensors? What should I look for in the fuel injector? Thank you

Sunday, January 5th, 2025 AT 2:42 PM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
51,281 POSTS

When you say fuel is spraying over the engine this would be the first thing I would address. It sounds like the fuel injector, or the O ring needs replacement. The next two are ignition coil codes, but it can be because of the spark plugs being cracked or they need replacement. Next, replace the crankshaft angle sensor and then clear the codes.

P0355 - Ignition Coil "E" Primary/Secondary Circuit Malfunction
P0357 - Ignition Coil "G" Primary/Secondary Circuit Malfunction
P1336 - Crankshaft Position (CKP) Sensor / Camshaft Position (CMP) Sensor Input Signal Error

Please start a new thread for the P0128 code.

P0128 - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature).

Here is the location and how to replace the crankshaft sensor. Check out the images (below). Please let us know what happens.

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