1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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17,323 Posts
Because the crank and cam sensors are inter-related (one can set the fault code for the other), it would be very unusual for 2 or more sensors to fail at once.
I would more suspect a common thread between all 3 sensor fault codes which would be the 5 volt supply or sensor ground from the PCM and its wiring. TPS-low could be a short to ground in the 5v power or signal return circuit which could affect all 3 sensors.
Once the PCM goes into protection because of a 5v short to ground, the battery power must be lifted from the PCM momentarily to resume 5v supply operation after re-connection. This will also erase the fault codes. The Vt/Wt wire should be your 5 volt sensor supply.
What are the wire colors to this sensor that appears to be the wrong one?
The tach/ign spark is driven from the crank position sensor. Fuel injector sync is driven from the cam sensor.
Any aftermarket security alarm or remote start on the car?
P0340-CAMSHAFT POSITION SENSOR CIRCUIT
When Monitored: Engine cranking/running. Battery voltage greater than 10 volts.
Set Condition: At least 5 seconds or 2.5 engine revolutions have elapsed with crankshaft
position sensor signals present but no camshaft position sensor signal. One Trip Fault.
POSSIBLE CAUSES
INTERMITTENT CRANKSHAFT POSITION SENSOR SIGNAL
INTERMITTENT CAMSHAFT POSITION SENSOR SIGNAL
5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
5 VOLT SUPPLY CIRCUIT OPEN
5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
CMP SIGNAL CIRCUIT SHORTED GROUND
CMP SIGNAL CIRCUIT OPEN
CMP SIGNAL CIRCUIT SHORTED TO VOLTAGE
CMP SIGNAL SHORTED TO 5 VOLT SUPPLY CIRCUIT
SENSOR GROUND CIRCUIT OPEN
PCM - 5 VOLT SUPPLY
PCM - CMP SIGNAL
CAMSHAFT POSITION SENSOR
P0335-CRANKSHAFT POSITION SENSOR CIRCUIT
When Monitored: Engine cranking.
Set Condition: No CKP signal is present during engine cranking, and at least 8 camshaft
position sensor signals have occurred.
POSSIBLE CAUSES
CHECKING INTERMITTENT CMP SIGNAL WITH LAB SCOPE
INTERMITTENT CKP SIGNAL
5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
5 VOLT SUPPLY CIRCUIT OPEN
5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
CKP SIGNAL CIRCUIT SHORTED GROUND
CKP SIGNAL CIRCUIT OPEN
CKP SIGNAL CIRCUIT SHORTED TO VOLTAGE
CKP SIGNAL SHORTED TO 5 VOLT SUPPLY CIRCUIT
SENSOR GROUND CIRCUIT OPEN
PCM - 5 VOLT SUPPLY
PCM - CKP SIGNAL
CRANKSHAFT POSITION SENSOR
I would more suspect a common thread between all 3 sensor fault codes which would be the 5 volt supply or sensor ground from the PCM and its wiring. TPS-low could be a short to ground in the 5v power or signal return circuit which could affect all 3 sensors.
Once the PCM goes into protection because of a 5v short to ground, the battery power must be lifted from the PCM momentarily to resume 5v supply operation after re-connection. This will also erase the fault codes. The Vt/Wt wire should be your 5 volt sensor supply.
What are the wire colors to this sensor that appears to be the wrong one?
The tach/ign spark is driven from the crank position sensor. Fuel injector sync is driven from the cam sensor.
Any aftermarket security alarm or remote start on the car?
P0340-CAMSHAFT POSITION SENSOR CIRCUIT
When Monitored: Engine cranking/running. Battery voltage greater than 10 volts.
Set Condition: At least 5 seconds or 2.5 engine revolutions have elapsed with crankshaft
position sensor signals present but no camshaft position sensor signal. One Trip Fault.
POSSIBLE CAUSES
INTERMITTENT CRANKSHAFT POSITION SENSOR SIGNAL
INTERMITTENT CAMSHAFT POSITION SENSOR SIGNAL
5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
5 VOLT SUPPLY CIRCUIT OPEN
5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
CMP SIGNAL CIRCUIT SHORTED GROUND
CMP SIGNAL CIRCUIT OPEN
CMP SIGNAL CIRCUIT SHORTED TO VOLTAGE
CMP SIGNAL SHORTED TO 5 VOLT SUPPLY CIRCUIT
SENSOR GROUND CIRCUIT OPEN
PCM - 5 VOLT SUPPLY
PCM - CMP SIGNAL
CAMSHAFT POSITION SENSOR
P0335-CRANKSHAFT POSITION SENSOR CIRCUIT
When Monitored: Engine cranking.
Set Condition: No CKP signal is present during engine cranking, and at least 8 camshaft
position sensor signals have occurred.
POSSIBLE CAUSES
CHECKING INTERMITTENT CMP SIGNAL WITH LAB SCOPE
INTERMITTENT CKP SIGNAL
5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
5 VOLT SUPPLY CIRCUIT OPEN
5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
CKP SIGNAL CIRCUIT SHORTED GROUND
CKP SIGNAL CIRCUIT OPEN
CKP SIGNAL CIRCUIT SHORTED TO VOLTAGE
CKP SIGNAL SHORTED TO 5 VOLT SUPPLY CIRCUIT
SENSOR GROUND CIRCUIT OPEN
PCM - 5 VOLT SUPPLY
PCM - CKP SIGNAL
CRANKSHAFT POSITION SENSOR