ECM Diagnostic Codes

 

CODE

Circuit Affected

CODE

Circuit Affected
12 No Distributor (TACH) Signal 44 Lean Exhaust Signal
13 O2 Sensor Not Ready 45 Rich Exhaust Signal
14 Shorted Coolant Sensor Circuit 51 PROM Error Indicator
15 Open Coolant Sensor Circuit 52 ECM Memory Reset Indicator
16 Generator Volatage Out Of Range 53 Distributor Signal Interrupt
18 Open Crank Signal Circuit 60 Transmission Not In Drive
19 Shorted Fuel Pump Circuit 63 Car And Set Speed Tolerance Exceeded
20 Open Fuel Pump Circuit 64 Car Acceleration Exceeds Maximum Limit
21 Shorted Throttle Position Sensor Circuit 65 Coolant Temperature Exceeds Maximum Limit
22 Open Throttle Position Sensor Circuit 66 Engine RPM Exceeds Maximum Limit
23 EST/Bypass Circuit Problem 67 Shorted Set Or Resume Circuit
24 Speed Sensor Circuit Problem .7.0 System Ready For Further Tests
26 Shorted Throttle Switch Circuit .7.1 Cruise Control Brake Circuit Test
27 Open Throttle Switch Circuit .7.2 Throttle Switch Circuit Test
28 Open Fourth Gear Circuit .7.3 Drive (ADL) Circuit Test
29 Shorted Fourth Gear Circuit .7.4 Reverse Circuit Test
30 ISC Circuit Problem .7.5 Cruise On/Off Circuit Test
31 Shorted MAP Sensor Circuit .7.6 "Set/Coast" Circuit Test
32 Open MAP Sensor Circuit .7.7 "Resume/Accelleration" Circuit Test
33 MAP/BARO Sensor Correlation .7.8 "Instant/Average" Circuit Test
34 MAP Signal Too High .7.9 "Reset" Circuit Test
35 Shorted BARO Sensor Circuit .8.0 A/C Clutch Circuit Test
36 Open BARO Sensor Circuit -1.8.8 Display Check
37 Shorted MAT Sensor Circuit .9.0 System Ready To Display Engine Data
38 Open MAT Sensor Circuit .9.5 System Ready for Output Cycling Or In Fixed Spark Mode
39 TCC Engagement Problem .9.6 Output Cycling
.0.0 All Diagnostics Complete