Home/Chevrolet/Caprice Impala SS/Chevrolet Caprice Impala SS (1995-1996)/Repair manual/Engine Controls - Tests W/codes - 5.7l/CODE 63, RIGHT HEATED OXYGEN SENSOR CIRCUIT OPEN

Contents

Wiring diagrams Section: Engine Controls - Tests W/codes - 5.7l

INTRODUCTION

SELF-DIAGNOSTIC SYSTEM

HARD FAILURES

INTERMITTENT FAILURES

DIAGNOSTIC PROCEDURE

READING TROUBLE CODES

TROUBLE CODE DEFINITIONS

HARD OR INTERMITTENT TROUBLE CODE DETERMINATION

CLEARING TROUBLE CODES

PCM LOCATION

Diagnostic Aids

Field Service Mode Check (If Available)

SPECIAL TOOLS (DIAGNOSTIC)

SCAN TESTER USAGE

SCAN DATA

ECM/PCM CODE CHARTS

CODE 11, MALFUNCTION INDICATOR LIGHT

CODE 13, LEFT HEATED OXYGEN SENSOR CIRCUIT OPEN

CODE 14, COOLANT TEMP SENS SGNL VLTGE LOW (HI TEMP INDICATED)

CODE 15, COOLANT TEMP SENSOR SIGNAL VOLTAGE LOW

CODE 16, OPTI-SPARK IGNITION SYSTEM LOW RESOLUTION PULSE

CODE 18, INJECTOR CIRCUIT

CODE 21, THROTTLE POSITION SENSOR SIGNAL VOLTAGE HIGH

CODE 22, THROTTLE POSITION SENSOR SIGNAL VOLTAGE LOW

CODE 23, IAT SENSOR SIGNAL VOLTAGE HIGH (LOW TEMP INDICATED)

CODE 24, VEHICLE SPEED SENSOR

CODE 25, IAT SENSOR SIGNAL VOLTAGE LOW (HIGH TEMP INDICATED)

CODE 26, CANISTER PURGE SOLENOID

CODE 27, EGR SOL VALVE

CODE 28, TRANS. RANGE PRESSURE SWITCH

CODE 29, SECONDARY AIR INJECTION

CODE 32, EGR SYSTEM ERROR

CODE 33, MAP SENSOR SIGNAL VOLTAGE HIGH

CODE 34, MAP SENSOR SIGNAL VOLTAGE LOW

CODE 36, OPTI-SPARK HIGH RESOLUTION PULSE

CODE 37, TCC BRAKE SWITCH ERROR

CODE 38, BRAKE SWITCH ERROR

CODE 41, OPTI-SPARK IGNITION SYSTEM OPEN OR SHORTED EST CKT

CODE 42, IC CIRCUIT GROUNDED

CODE 43, KNOCK SENSOR CIRCUIT (DUAL SENSORS)

CODE 44, LEFT HEATED OXYGEN SENSOR LEAN EXHAUST INDICATION

O2 Sensor Wire

Fuel Contamination

Fuel Pressure

Exhaust Leaks

Misfire Or Stall

CODE 45, LEFT HEATED OXYGEN SENSOR RICH EXHAUST INDICATION

Fuel Pressure High

Ignition Ground

Evaporative Fuel Canister

MAP Sensor

TPS

O2 Sensor Contamination

EGR Problem

CODE 46, PASS-KEY CIRCUIT

Pass-Key Diagnosis

CODE 47, KNOCK SENSOR MODULE

CODE 48, MASS AIRFLOW SENSOR

CODE 50, SYSTEM VOLTAGE LOW

CODE 52, FAULTY CAL-PAK

CODE 53, SYSTEM VOLTAGE HIGH

CODE 55, PCM ERROR

CODE 55, FUEL LEAN MONITOR

CODE 58, TRANS TEMPERATURE SENSOR HIGH TEMPERATURE

CODE 59, TRANS. TEMPERATURE SENSOR LOW TEMPERATURE

CODE 63, RIGHT HEATED OXYGEN SENSOR CIRCUIT OPEN

CODE 64, RIGHT HEATED OXYGEN SENSOR LEAN EXHAUST INDICATION

CODE 65, RIGHT HEATED OXYGEN SENSOR RICH EXHAUST INDICATION

CODE 66, A/C PRESSURE SENSOR

CODE 67, A/C PRESSURE SENSOR

CODE 68, A/C RELAY CIRCUIT SHORTED

CODE 69, A/C COMPRESSOR RELAY

CODE 70, A/C COMPRESSOR RELAY DRIVER

CODE 72, VEHICLE SPEED SENSOR LOSS

CODE 73, PRESSURE CONTROL SOLENOID

CODE 75, TRANSMISSION VOLTAGE LOW

CODE 77, PRIMARY COOLING FAN DRIVER

CODE 78, SECONDARY COOLING FAN DRIVER

CODE 79, TRANSMISSION FLUID OVERTEMP

CODE 81, 2-3 SHIFT SOLENOID

CODE 82, 1-2 SHIFT SOLENOID

CODE 83, TCC PWM SOLENOID - A/T

CODE 84, 3-2 CONTROL SOLENOID - WITH A/T

CODE 85, TCC STUCK ON

CODE 90, TCC SOLENOID CIRCUIT

CODE 95, CHANGE OIL LIGHT

CODE 96, LOW OIL LIGHT

CODE 97, VSS OUTPUT CIRCUIT

SUMMARY

All sections

CODE 63, RIGHT HEATED OXYGEN SENSOR CIRCUIT OPEN Chevrolet Caprice Impala SS

Engine Controls - Tests W/codes - 5.7l ~300 words

CODE 63, RIGHT HEATED OXYGEN SENSOR CIRCUIT OPEN

Note. The 5.7L (VIN P) engine is equipped with 2 oxygen sensors. On this model, code will set if the right sensor circuit is open. Code 13 will set if the left sensor circuit is open. Oxygen sensors use a heating element. Heating element is not controlled by PCM.

Code will set if Codes 21 and 22 are not set, engine is at normal operating temperature, oxygen sensor voltage is constant within a specified range (.35-.55 volt), throttle angle is greater than idle, a precalibrated amount of time has elapsed since start-up and all conditions have existed for a precalibrated amount of time. Most likely causes of code are: open sensor signal (high) circuit, faulty PCM connection, faulty PCM, faulty oxygen sensor connection or faulty oxygen sensor.

Note. Test numbers refer to numbers on diagnostic chart.

This tests if problem still exists. Vehicle cannot enter "closed loop" mode if oxygen sensor circuit is open. Code indicates an open in O2 sensor circuit (steady .35-.55 volt).
Determines if oxygen sensor, wiring or control module is at fault. If wiring is good, grounding oxygen sensor wire will cause .45 volt reference supplied by control module to pull low.
This tests oxygen sensor circuit wiring. Use only a high impedance (10-megohm minimum) digital voltmeter.

Control module will not go into closed loop if code is set. Code may set if vehicle runs out of fuel or stalls while vehicle is in motion. If oxygen sensor ground becomes loose, a false oxygen sensor reading will occur. This can result in a Code 63 being set. On models equipped with an oxygen sensor heating element, element resistance should be 3.5-14.0 ohms.

Application	PCM Terminal	Wire Color
Right O2 Signal	C8	Purple
Right O2 Ground	C7	Tan

CODE 63 PCM TERMINAL & CIRCUIT WIRING IDENTIFICATION