Thread: Rattling noise please help

P0135 - o2 sensor heater circuit malfunction (bank #1 sensor #1)

P0300 - Random/Multiple Misfire detected

P0305 - cylinder 5 misfire

P1404 - EGR stuck open?

i would start by checking your plugs, wires, coils and icm. check the wires on the o2 sensor on the rear mani to make sure they arent possibly frayed or burnt or anything of that sort. might need replacing.

Having a misfire and dumping raw fuel into the cat will make it red hot. Check out what bp said first.

Pull the plugs and see what they look like, and pull the O2 and see what it looks like also.
I pulled the P0135 and the P0305 before, and it was the O2 sensor. Popped in a simulator, and cured both.

does it smell like rotten eggs? good sign of cat being clogged. Also if u dont already have an automotive stethascope, take a piece of hose, like heater hose, put one end to your ear and put the other end to where the coupler is and if uhear the sound in your ear, wahla. or take your s/c belt off and start the car, if no sound with belt on then its 9 times out of 10 your coupler.

Sounds like a coupler, but is kinda fast compared to how mine sounded when the coupler was bad. It might also be a shot Tensioner pulley. Take the S/C belt off, and see if it still makes the noise.

yeah take the belt off and see if the noise goes away.

You should get a new coupler, with new S/C oil(gonna need it) and a new 02 sensor, and see if there are any codes after that.

why would u need a new crank sensor if your not throwing a code for that?! if u had a P1374 code then it would more than likely be a cps but your not so u dont need one.

i just looked at my alldata account and there is no P0366, only a P0336 which deals with 18x reference signal. what scanner are u getting your codes from?

im not sure. others will chime in and can give u a better idea on that.

this is from alldata.

An intermittent may be caused by a poor connection, rubbed through wire insulation or a broken wire inside the insulation. Inspect for the following conditions:

• Misrouted wiring harness. Inspect the ICM harness to ensure that it is not routed near secondary ignition components.
• Malfunctioning Ignition Coil. Remove the ignition coils and inspect the ignition control module and coils for cracks, carbon tracking, or other signs that indicate that the coil secondary circuit is arcing to the ICM or ICM wiring harness. Refer to Ignition Coil(s) Replacement.
• Secondary ignition wire(s) arcing to wiring harness. Inspect secondary ignition wires for carbon tracking or other signs of damage.

IMPORTANT: Remove any debris from the connector surfaces before servicing a component. Inspect the connector gaskets when diagnosing or replacing a component. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion.

• Poor terminal connection. Inspect the harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and faulty terminal to wire connection. Use a corresponding mating terminal to test for proper tension. Refer to Diagrams for diagnosis and repair.
• Damaged harness. Inspect the wiring harness for damage. If the harness inspection does not reveal a problem, observe the display on the scan tool while moving connectors and wiring harnesses related to the sensor. A change in the scan tool display may indicate the location of the fault. Refer to Diagrams for diagnosis and repair.
• Inspect the PCM and the engine grounds for clean and secure connections.

If the DTC is determined to be intermittent, reviewing the Failure Records can be useful in determining when the DTC was last set.