Codes P198, P335 and P523?

Hi,

The crankshaft position sensor will usually cause issues when the engine is at operating temperature or all the time.

The one that has my attention is the IAT sensor. The PCM uses info from this sensor to control Injector pulse-width and to adjust spark timing.

However, I want you to try something before anything. When you say it takes 7-8 to start every time, do you mean that many attempts or it cranks for 7 to 8 seconds? If you meant attempts, try this, and let me know what happens.

1) With the key off, turn it to the run position (engine off) and count to 5.

2) Turn the key off and repeat step 1 a total of 5 times.

3) On the sixth cycle, see if it starts normally.

If that makes no difference, I would move to the IAT sensor. I attached the directions for the removal and replacement of the component below

Let me know the results.

Take care,

Joe

See pics below.

Then it isn't a fuel pressure drop-off issue. The pic you attached above shows the intake air temperature sensor (IAT).

See pic below.

Joe

Hi,

When you say CPS, do you mean the crankshaft position sensor? Also, the idea behind the 5 times turning the key on and off is to force the system to pressurize the fuel system. If that was the issue (fuel pressure drop) this procedure would have allowed, it to start normally. Since it didn't, the pressure isn't my primary focus.

Did you do anything with the intake air temperature sensor?

Let me know.

Joe

Hi,

The oil temperature sensor isn't even providing a signal. Also, 96 psi for pressure is extreme. Was the engine at idle?

Joe

Hi,

Is it constantly at 96? I attached specs below for you to review. It indicates between 25 PSI and 110 PSI at 3,000 RPMs. If you are at 96 PSI at idle, either we have a resistance issue in the wiring, or the sensor is bad.

Joe

Hi,

I attached the entire powertrain management circuit, but that may be worse or more confusing for you. The way the manuals are set up, I can't pull one separate harness.

I highlighted each of the three components you mentioned.

The schematic is five pages long, but I had to cut each pin in half to make them readable. I did overlap them for you.

Let me know if this helps.

Take care,

Joe

See pics below.

Hi,

Are you referring to the trans oil temperature sensor? It's in pic 7. I copied it and attached it below.

Let me know.

Joe

Hi,

There is nothing in the schematic indicating an engine oil temperature sensor. The sensor above the filter is the oil pressure sensor. See the pic below.

Let me know.

Joe

See pic below.