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Troubleshooting
/ OBD2 Test
Incomplete
OBD2 (OBDII) Scan Test is Incomplete
The computer system or ECM, PCM (engine control module, powertrain control module)
that controls your car is equipped with a basic operating program. This operating
program is designed to control your engine, transmission, emissions, safety systems
and more. If a scan has been performed by using a
code scanner
and a "scan could not be completed" code is retrieved further
troubleshooting is necessary. Usually a trouble
code
P1000 or manufacturers equivalent. We have listed several reasons for
this condition.
- Stuck
Engine Thermostat - If the engine thermostat has stuck open it forces
the engine coolant to stay at too low of a temperature causing the ECM/PCM
to stay in open loop. This open loop creates a state of preprogrammed
parameters were no diagnostic tests can be preformed.
(ECM/PCM is constantly waiting for the
engine to heat up to operating temperature for closed loop operation)
- Shorted
Oxygen Sensor/Coolant Sensor - The ECM/PCM relies on information from
sensors to operated, if one of these sensors is severely shorted it can
cause the ECM/PCM to stay in open loop, causing a code gathering incomplete
trouble code
- Shorted
Fuel Injector - If a fuel injector short circuits it can cause the
engine not to run by shorting the injector driver. If the car doesn't run
and a code gathering incomplete trouble code like P1000 is present, it could
be a fuel injector shorted. Unplug all injectors and try to rescan system
For exact specific repair procedures for any of the steps above visit our
online repair
manual page.
Troubleshooting
/ OBD2 Test
Incomplete
Additional "How to" Car Repair or Services
1. How to Replace
Air Filter?
2. How to Change
a Cabin Filter?
3. How to Change
Oil and Filter?
4. How to Tune Up with
Throttle Bore Service?
5. How to Replace
a Radiator?
6. How to
Replace Fuel Filter?
7. How to Read Trouble Codes?
8. How Filters Work?
9. How to Replace
Front Brake Pads?
10. How to Replace Rear
Brake Pads?
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