No start Had Codes p0340 & p0345 both are cmp sensors. Replace both and still no start has no injector pulse and spark.

this is code p0340
P0340 Camshaft Position Sensor Circuit Malfunction and this is p0345
P0345 Camshaft Position Sensor Circuit Malfunction Bank 2 problem can be the sensor --but this is circuit so sensor --wiring -harness --connections etc ---and if your at dealer ask them also about your codes

P0345 and P0340 are "Camshaft Position Sensor" problems. Hopefully it is only a wire or sensor bad, and not a camshaft improperly lined up when the belt was changed.
Go back to dealer to have the problem fixed. If the motor runs smoothly, it should be okay to drive to the dealer. The mechanic might have left a sensor wire disconnected.

DTC P0340: Intake CMP Sensor Circuit
DTC P0341: Intake Camshaft Position (CMP) Sensor Performance
DTC P0365: Exhaust Camshaft Position (CMP) Sensor Circuit
DTC P0366: Exhaust Camshaft Position (CMP) Sensor Performance

The five volt reference circuit .

The 4X camshaft position (CMP) sensor circuits consist of an engine control module (ECM) supplied 5-volt reference circuit, low reference circuit, and an output signal circuit. The CMP sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of the teeth and slots of a 4-tooth reluctor wheel attached to the camshaft. As each reluctor wheel tooth rotates past the CMP sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with 4 varying width output pulses per camshaft revolution that represent an image of the camshaft reluctor wheel. The frequency of the CMP sensor output depends on the velocity of the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to determine the optimum ignition and injection points of the engine. The ECM also uses CMP sensor output information to determine the camshaft relative position to the crankshaft, to control camshaft phasing, and for limp-home operation.
Do you know what the five volt reference circuit is .

How to check the 5v reference circuit for short to ground Cadillac

codes p 0171 and 174 refer ti system too lean
codes p 0338,340,365 refers to crank. and can shaft position sensors
code p1338 again is camshaft position sensor
code p1315 again is camshaft position sensor
too lean can be from fuel pump pressure too low
and position sensors can be wiring , connections sensors.
Involved in all these , one of the possible causes is the ECM
IF it is possible get a serviceable replacement ECM unit and substitute it first as there is no point in replacing all the rest if the ECM is faulty
could be water in the connections , corrosion etc
it is always suspect when so many different codes suddenly appear at the same time

P0340 - Camshaft Position (CMP) Sensor Circuit Malfunction ,did you check the wiring ?
P0340 - Camshaft Position (CMP) Sensor Circuit Malfunction The test fails when the PCM can no longer detect the signal from the CMP sensor.

• CMP circuit open
• CMP circuit short to GND
• CMP circuit short to PWR
• SIG RTN open (VR sensor)
• CMP GND open (Hall effect sensor)
• CMP misinstalled (Hall effect sensor)
• Damaged CMP sensor shielding
• Damaged CMP sensor
• Damaged PCM

Harness routing, harness alterations, improper shielding, or electrical interference from other improperly functioning systems may have intermittent impact on the CMP signal. DR1 DTC P0340: CHECK IF ENGINE WILL START

Note: Refer to the Pinpoint Test Schematic to determine the type of CMP sensor.

• Start engine.

Will the engine start? Yes No GO to DR2 . DTC P0340 is not the cause of the No Start. GO to Section 3 to diagnose the No Start symptom. Is the PCM firing the injectors ?

• Starting Concerns:
  • No Start, Normal Crank

Note: Extended cranking because of a no start can load the exhaust system with raw fuel, damaging the catalytic converter after the engine starts. For applications with Secondary Air Injection (AIR) Systems, perform the following after the no start has been repaired: Disconnect the electric secondary air injection (AIR) solid state relay, run the engine until the surplus fuel is used up, and reconnect the relay (disconnecting the relay may set a Continuous Memory PCM DTC that will need to be cleared).


SYSTEM/COMPONENT REFERENCE (Section 5 Pinpoint Test unless noted)

• Add-on Anti-Theft Devices

• Visual, check with customer.

• Fuel/Ignition

• For LS6/LS8:
• GO to KB85 .
• All others:
• GO to A1 .

• If engine is now a no start:
• If engine will start and run normally at part throttle, check Idle Air Control (IAC) System.

• Engine will now start and run normally at part throttle:
• GO to KE2

• Exhaust System (restrictions)

• GO to HF1

• Base Engine

• Engine System - General Information Section 303-00 of the Workshop Manual.

• Additional Testing

• GO to Z1

DTC P0340: Camshaft Position (CMP) Sensor Circuit
P0340 ?€¢
The ECM detects that the starter is commanded on and the engine has been cranking for more than 4 seconds without a CMP sensor pulse.

OR

?€¢
The ECM detects that the engine has started, but did not received a CMP sensor pulse during the first engine revolution.

OR

?€¢
The ECM detects that the engine is running, but does not receive a CMP sensor pulse for 800 of 1,000 engine cycles.

The 4X camshaft position (CMP) sensor circuits consist of an engine control module (ECM) supplied 5-volt reference circuit, low reference circuit, and an output signal circuit. The CMP sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of the teeth and slots of a 4-tooth reluctor wheel attached to the camshaft. As each reluctor wheel tooth rotates past the CMP sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with 4 varying width output pulses per camshaft revolution that represent an image of the camshaft reluctor wheel. The frequency of the CMP sensor output depends on the velocity of the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to determine the optimum ignition and injection points of the engine. The ECM also uses CMP sensor output information to determine the camshaft relative position to the crankshaft, to control camshaft phasing, and for limp-home operation.
You need a cam sensor or have wiring problem !

If you remove the fuel line and crank the engine and get fuel then you could be assured that the crank sensor works but if there is no fuel while cranking then the crank sensor is most likely the fault. If the crank sensor is not the problem then it is most likely in the coil or distributor which the 97 is notorious for.

if you have NO spark NO injection pulse suspect a Camshaft Position Sensor(CMP), that is the sensor that tells the computer your ignition firing and timing and pulse width for your injectors once it has received a signal from your Crankshaft Position Sensor (CKP) the 2 sensors work together to achieve the correct combination for start up

mapping sensor could be going or is bad

Trouble Code: P0139
O2 (B1 S2) Slow Response
Trouble Code Conditions:Engine started; vehicle driven at 20-55 mph with the throttle open for 2 minutes; ECT at more than 158ºF (70C); catalytic converter temperature is more than 1112F (600C); and EVAP purge is active. O2 Sensor signal voltage switches less than 16 times from lean to rich within 20 seconds during monitoring, or will compare the state of change between the front and rear O2 Sensors and if the differences are greater than a calibrated amount, the DTC will set. 3 good trips are required to turn off the MIL.
Possible Causes:

• Exhaust leak
• O2 element is contaminated, deteriorated or it has failed
• O2 signal circuit or return circuit has failed

Trouble Code: P0344
Camshaft Position Sensor Circuit Intermittent
Trouble Code Conditions:Engine cranking or running; system voltage over 10.5v. The PCM detected an intermittent loss of the CMP Sensor signal during the period of 2.5 complete engine revolutions. The failure counter must reach 20 before this code matures and a code is set.
Possible Causes:

• Wiring harness fault
• 5v supply circuit open or shorted to ground
• Tone wheel/pulse ring is damaged or corroded
• CMP Sensor has failed
• CMP Sensor signal circuit is open, shorted to ground or battery voltage or 5v supply
• CMP Sensor ground circuit is open
• PCM has failed
• Trouble Code: P0340
  No Camshaft Position Sensor Circuit Failure
  Trouble Code Conditions:Engine cranking or running, system voltage over 10v. The PCM detected CKP pulses without detecting any CMP Sensor pulses for 5 seconds or 2.5 engine revolutions.
  Possible Causes:
  
• CMP Sensor connector is damaged, open or it is shorted
• CMP Sensor signal circuit is open or shorted to ground or to battery voltage or 5v supply circuit
• CMP Sensor 5v supply circuit is open or shorted to ground or to battery voltage
• CMP Sensor ground circuit is open
• CMP Sensor is damaged or has failed
• CKP Sensor is damaged or has failed
• PCM has failed

Good luck....