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1997 Chevrolet C1500 4.3L Excessive Emissions
Posted to GM Driveability on 3/19/2009 5 Replies

The 02 sensors are switching ok( P0147 including the b1s3 ) the tp sensor voltage readings are within range ( P0121 ) ( P0300 ) was in freeze frame only, there are no misfire counts showing on any cylinder.

The stft's 1 & 2 are at mid 120's the ltft's are at ...

5 Replies Received (View Replies)

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car Vehicle Data

1997 Chevrolet C1500

VIN 1GCEC14W3V
Engine4.3 L / 6 cyl / GAS
Trans5-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions
OccursAlways

Trouble Codes

P0121Throttle Position Sensor Range/Performance
P0147Heated Oxygen Sensor (Bank 1 Sensor 3) Heater Circuit Malfunction
P0300Multiple Misfire Detected
Message Closed

car Vehicle Data

1997 Chevrolet C1500

VIN 1GCEC14W3V
Engine4.3 L / 6 cyl / GAS
Trans5-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions
OccursAlways

Trouble Codes

P0121Throttle Position Sensor Range/Performance
P0147Heated Oxygen Sensor (Bank 1 Sensor 3) Heater Circuit Malfunction
P0300Multiple Misfire Detected