PO370 (timing reference)

[tinknocker]

I recently changed my 98 truck to mech. IP.....Runs great! Just ran the codes out of curiosity and the one #PO370 - Timing Reference High has me wondering.
I was wondering what sensors are in play with this code.

The only codes other than the various elec. IP codes (4 of them) were:
Timing Reference High.
Coolant temp high.

I did break the sensor at the top of the thermostat (hooked it on my belly) but the pins mate back up and I have a temp reading at 180 or so. Truck is certainly not hot. I think I will check that timing out, however. Anybody know how that PO370 (timing reference) works? What sensor is used? I was wondering if it was even valid with the DS4 gone.

Any more in depth info would be appreciated on the PO370 code.

 

[chrisk1500]

Optic sensor at the top of the DS4 gives the 0370 code....

 

[tinknocker]

Ok Chrisk
That must mean that is irrelevant as there is no optic sensor, unless ECM compares optic sensor with other input.

Thanks

Bob