2004 tahoe hard startig OB 2 code P0342 showing

code p0342 refers to cam shaft position (CMP) sensor A bank 1 --low input===causes--wiring short to ground---CMP sensor---ECM
Check for wiring shorting out on the engine /body, replace the cam sensor on bank 1

Crank shaft sensor
Remove the driver side rear ignition coil bolts. Reposition the coil. Disconnect the crankshaft position (CKP) sensor electrical connector. # Use penetrating oil and allow the oil to soak around the CKP sensor prior to removing the sensor. You're looking at left, rear side of engine.
CAMSHAFT POS.
front side of engine on the drives side about half way up the timing cover, not hard to get to.

EXHAUST RELATED ERROR CODES

There are 711 possible PO generic DTC error codes. Only 7 of the 711 codes are exhaust related.

PO401: Insufficient EGR Flow

PO402: Exhaust Gas Recirculation (EGR) Excessive Flow Detected

PO410: Secondary Air Injection System Malfunction

PO420: Catalyst System Efficiency Below Threshold (Bank 1)

PO421: Warm-Up Catalyst Efficiency Below Threshold (Bank 1)

PO430: Catalyst System Efficiency Below Threshold (Bank 2)

PO431: Warm-Up Catalyst Efficiency Below Threshold (Bank 2)

THINGS TO ASK YOURSELF OR YOUR CUSTOMER

Have there been any driveability or performance issues with the vehicle, have there been any recent repairs or tune-up work performed, if so was the check engine light reset and were the codes recorded on previous repair orders.

Do not rely on scan tool data alone. In most applications, the customer will have the check engine light reset prior to repair. If the original cause of converter failure is intermittent, only the catalyst failure code may show up (masking the original reason for converter failure).

157= 02 sensor ckt low volts 2/ 2 158=o2 sensot ckt high volts 2/ 2 159= o2s ckt slow response 2/2 181= fuel temp sensor a ckt rng/perform 327= knock sensor 1 ckt low imput bank 1 or single sensor 332= knock sensor 2 ckt low input bank 2

From what I can find in my book - they are (generic code)
P 0700 Transmission Control System Malfunction
P 0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
P 0137 O2 Sensor Cicuit Low Voltage (Bank 1 Sensor 2)
P 0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor)
P 0171 System Too Lean (Bank 1)
Could not find these codes in the GM section - that is why I went with the Generic codes

Generic OBD II Diagnostic Trouble Codes

DTC CODES P0300 to P0399

P0300....Random/Multiple Cylinder Misfire Detected

P0301....Cylinder 1 Misfire Detected

P0302....Cylinder 2 Misfire Detected

P0303....Cylinder 3 Misfire Detected

P0304....Cylinder 4 Misfire Detected

P0305....Cylinder 5 Misfire Detected

P0306....Cylinder 6 Misfire Detected

P0307....Cylinder 7 Misfire Detected

P0308....Cylinder 8 Misfire Detected

P0309....Cylinder 9 Misfire Detected

P0310....Cylinder 10....Misfire Detected

P0311....Cylinder 11 Misfire Detected

P0312....Cylinder 12 Misfire Detected

P0313....Misfire Detected with Low Fuel

P0314....Single Cylinder Misfire (Cylinder not Specified)

P0320....Ignition/Distributor Engine Speed Input Circuit

P0321....Ignition/Distributor Engine Speed Input Circuit Range/Performance

P0322....Ignition/Distributor Engine Speed Input Circuit No Signal

P0323....Ignition/Distributor Engine Speed Input Circuit Intermittent

P0324....Knock Control System Error

P0325....Knock Sensor 1 Circuit (Bank 1 or Single Sensor)

P0326....Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)

P0327....Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)

P0328....Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)

P0329....Knock Sensor 1 Circuit Input Intermittent (Bank 1 or Single Sensor)

P0330....Knock Sensor 2 Circuit (Bank 2)

P0331....Knock Sensor 2 Circuit Range/Performance (Bank 2)

P0332....Knock Sensor 2 Circuit Low Input (Bank 2)

P0333....Knock Sensor 2 Circuit High Input (Bank 2)

P0334....Knock Sensor 2 Circuit Input Intermittent (Bank 2)

P0335....Crankshaft Position Sensor A Circuit

P0336....Crankshaft Position Sensor A Circuit Range/Performance

P0337....Crankshaft Position Sensor A Circuit Low Input

P0338....Crankshaft Position Sensor A Circuit High Input

P0339....Crankshaft Position Sensor A Circuit Intermittent

P0340....Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)

P0341 Camshaft Position Sensor 'A' Circuit Range/Performance (Bank 1 or Single Sensor)

P0342....Camshaft Position Sensor 'A' Circuit Low Input (Bank 1 or Single Sensor)

P0343....Camshaft Position Sensor 'A' Circuit High Input (Bank 1 or Single Sensor)

P0344....Camshaft Position Sensor 'A' Circuit Intermittent (Bank 1 or Single Sensor)

P0345....Camshaft Position Sensor 'A' Circuit (Bank 2)

P0346....Camshaft Position Sensor 'A' Circuit Range/Performance (Bank 2)

P0347....Camshaft Position Sensor 'A' Circuit Low Input (Bank 2)

P0348....Camshaft Position Sensor 'A' Circuit High Input (Bank 2)

P0349....Camshaft Position Sensor 'A' Circuit Intermittent (Bank 2)

P0350....Ignition Coil Primary/Secondary Circuit

P0335 - Crankshaft Position Sensor "A" Circuit
P0342 - Camshaft Position Sensor "A" Circuit Low Bank 1 or Single Sensor.

Click the code links above to access more information that pertains to the codes you posted.

P0342 - camshaft position sensor A circuit low input
( bank 1 or single sensor )

P0217 - engine coolant over temperature condition

hallo
P0342 code means: camshaft position sensor- low imput. Check wiring (short to earth), if OK change camshaft position sensor.
Marko

the code for camshaft sensor is--p0341 and p0342, po341 is camshaft range or performance problem. p0342 is camshaft curcuit , low input. hope this helps carl.