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Trouble Code Definitions

NOTE: Trouble codes will be recorded at various operating times. Some codes require sensor or switch operation for 5 seconds and others may require longer under certain conditions. Some codes may not set in a service bay operational mode.
TROUBLE CODE IDENTIFICATION

Code Circuit Affected Probable Cause
13 Oxygen Sensor Signal Voltage Does Not Change
14 Coolant Temp. Sensor Low Temp. Indicated
15 Coolant Temp. Sensor High Temp. Indicated
21 Throttle Position Sensor Signal Voltage High
22 Throttle Position Sensor Signal Voltage Low
23 Intake Air Temp. Sensor Low Temp. Indicated
24 Vehicle Speed Sensor No Speedometer
25 Intake Air Temp. Sensor High Temp. Indicated
31 MAP Sensor Low Voltage Input, Low Vacuum
32 MAP Sensor High Voltage Input, High Vacuum
41 Ignition Signal No Signal
42 Camshaft Position Sensor No Signal For 2 Seconds
46 (1) Idle Speed Control Motor ISC Motor Inoperative
51 EGR System EGR SV Valve Inoperative
(1) Upgraded emissions only.