On-board diagnostics (OBD) systems were introduced in the 1980s to help mechanics and vehicle owners identify issues with their vehicles. Chrysler, Dodge, and Plymouth vehicles built before 1996 use the OBD1 system, This guide will show you how to gather trouble codes, and what the codes mean.
Retrieval Method
- To start gathering trouble codes turn the ignition key on off in rapid
succession five times ending the cycle with the key in the on position, (key
dance).
- Once this activation has started, the check engine light will start to
flash. The first set of check engine light flashes will be the first digit
of the two digit code. After the check engine light pauses for a short time
it will start to blink again starting the second digit identification and
completing the code's second number. For example: The check engine light flashes four times, pauses and then
flashes three more times, the code is 43.
- The check engine light will flash five and then five (55) meaning the code gathering is over. The system will flash 12 if there are no codes stored in the computer's memory. To clear codes disconnect the negative battery terminal for 30 seconds and reconnect.
Chrysler, Dodge and Plymouth ODB1 Code Definitions
11 - Camshaft signal or ignition signal, no reference signal during cranking.
12 - Memory to controller has been cleared within 50-100 engine starts.
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13 - Map sensor not detecting any change during test.
14 - Map voltage too high or too low.
15 - Vehicle speed sensor, no signal detected.
16 - Knock sensor circuit. Open or short detected.
17 - Low engine temperature, possible thermostat fault.
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21 - Oxygen sensor signal, neither rich or lean detected.
22 - Coolant sensor voltage low.
23 - Air charge voltage high/low detected.
24 - Throttle position sensor voltage high/low.
25 - Automatic idle speed motor driver circuit, short or open detected.
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26 - Injectors 1 2 and 3 peak current not reached.
27 - Injector control circuit does not respond to control signal.
31 - Purge solenoid circuit, open or short detected.
32 - EGR solenoid circuit, open or short detected.
33 - A/C clutch relay circuit, open or short detected.
34 - Speed control servo solenoid, open or short detected.
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35 - Radiator fan control relay circuit, open or short detected.
36 - Waste-gate solenoid, open or short detected.
37 - Part throttle unlock (PTU) circuit, open or short detected.
41 - Charging system circuit not responding to control signal.
42 - Fuel pump or auto shutdown (ASD) relay voltage sensed at controller.
43 - Ignition control circuit not responding.
44 - Battery temperature voltage circuit problem.
45 - Turbo boost limit exceeded-map sensor detects over-boost.
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46 - Battery voltage too high.
47 - Battery voltage too low.
51 - Air/fuel at limit.
52 - Logic module fault.
53 - Internal controller failure.
54 - Camshaft reference circuit not detected.
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55 - End of message.
61 - BARO read solenoid, open or short detected.
62 - EMR mileage not stored.
63 - Eprom write denied.
64 - Flex fuel sensor signal out of range.
65 - Manifold tuning valve, open or short detected.
66 - No CCD messages.
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76 - Ballast bypass relay, open or short detected.
77 - Speed control relay, open or short detected.
Import Code Definition
1 - Oxygen sensor.
2 - Crank engine sensor.
3 - Air flow sensor.
4 - Barometric pressure sensor.
5 - Throttle position sensor.
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6 - Motor position sensor.
7 - Engine coolant temperature sensor.
8 - No.1 cylinder TDC sensor.
12 - Air flow sensor.
13 - Air temperature sensor.
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15 - SC motor position sensor.
21 - Engine coolant temperature sensor.
22 - Crank angle sensor.
24 - Vehicle speed sensor.
25 - Barometric pressure sensor.
31 - Knock sensor.
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32 - Manifold pressure sensor.
36 - Ignition timing adjustment signal.
39 - Oxygen sensor.
41 - Injector circuit
42 - Fuel pump.
43 - EGR failure.
44 - Ignition coil circuit failure.
52 - Ignition coil circuit failure.
53 - Ignition coil circuit failure.
55 - IAC valve position sensor.
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59 - Heated oxygen sensor.
61 - Transaxle control unit cable.
62 - Warm up control valve position sensor
Credits
This guide knowledge base was created by the 2CarPros Team, and by Ken Lavacot: Automobile repair shop owner and certified master automobile technician of over 30 years. If you have question or need help please ask one of our experts we are happy to help. Please visit our 2CarPros YouTube Channel for additional car repairs.
Article published 2024-10-16
