How to Read 91 Mustang Odb1 Codes

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Join Date: Mar 2006

Posts: iii,552

EEC-4 Cocky-Test Codes

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Got your codes? Post them upward in the garage for assistance, but first bank check this list to get an idea almost the problem.

O—Key On, Engine Off code.
CM—Continuous Retentivity code.
R—Engine Running lawmaking.

ii-Digit Codes - 86-93 Mustangs

11 - Arrangement Pass (O,CM,R)
12 - RPM Not Inside Self Test Lower Limit (R), DC Motor Did Not Move (O,CM,R), Idle Speed Control motor or Air Featherbed not controlling idle properly -generally idle too low
13 - RPM Not Within Cocky Test Upper Limit (R), Idle Speed Control motor or Air Bypass not controlling idle properly -generally idle too loftier
xiv - Profile Ignition Pickup Circuit Failure (CM)
fifteen - Readout Memory Test Failed (O), Go on Alive Memory Test Failed (CM)
16 - RPM Too Low To Perform o2 Sensor Test (R)
17 - RPM below Self-Examination limit with Idle Air Control off (R)
18 - Spark Out (SPOUT) Circuit Open (R), Loss Of Ignition Diagnostic Module Input To PCM/SPOUT Circuit Grounded (CM)
19 - Failure In PCM Internal Voltage (R), Erratic RPM During Hard Idle Cocky Test (R), Failure in EEC reference voltage (O)
21 - Engine Coolant Temperature (ECT) Sensor Out Of Cocky Test Range. 0.3 to 3.7 volts(O,R)
22 - Manifold Absolute Force per unit area/Barometric Pressure Sensor Out Of Self Exam Range (O,CM,R)
23 - Throttle Position Sensor Out Of Self Test Range (O,CM,R)
24 - Intake Air Temperature/Air Charge Temperature Sensor Out Of Self Test Range. 0.iii to 3.7 volts(O,R)
25 - Knock Not Sensed During Dynamic Response Test (R)
26 - Mass Air Flow Sensor was greater than 0.vii volts with engine off (O), MAF sensor was not between 0.2 and one.5 volts with engine running (R).
28 - Loss Of Ignition Diagnostic Module RH Side (CM)
29 - Insufficient Input From Vehicle Speed Sensor -To 1992 (CM), Insufficient Input From Programmable Speedometer/Odometer Module -From 1993 (CM)
31 - EGR Valve Position/Pressure Feedback EGR Circuit Below Minimum Voltage. 0.24 volts (O,CM,R)
32 - EGR Valve Position/Pressure Feedback EGR Voltage Beneath Closed Voltage. 0.24 volts (O,CM,R)
33 - EGR Valve Opening Not Detected (CM,R)
34 - EGR Valve Position/Pressure Feedback EGR Voltage Above Airtight Limit (O,R), PFE or EVP circuit has intermittently failed above the closed limit of 0.67 volts (CM)
35 - EGR Valve Position/EGR Pressure Feedback EGR Circuit Higher up Maximum Voltage of iv.81 volts (O,R), PFE or EVP circuit has intermittently failed above the maximum limit of 4.81 volts (CM)
36 - System Indicates Lean At Idle (R)
37 - Arrangement Indicates Rich At Idle (R)
39 - AXOD converter bypass clutch not applying properly (CM)
41 - Organization Indicates Lean -rider side(R), No o2 Sensor Switching Detected. ever lean -passenger side(CM)
42 - System Indicates Rich -passenger side(R), No o2 Sensor Switching Detected. e'er rich -passenger side(CM)
43 - o2 Sensors betoken lean at Total Throttle (CM)
44 - Secondary Air Organisation Inoperative. depository financial institution one, passenger side (R)
45 - Secondary Air Upstream During Cocky Test (R)
46 - Secondary Air Not Bypassed During Cocky Test (R)
47 - Measured Air Flow Depression At Base Idle (R)
48 - Measured air period as well high at base of operations idle (R)
49 - 1–2 Shift Error (CM)
51 - Engine Coolant Temperature Circuit Open (CM,O)
52 - Ability Steering Pressure level Switch Circuit Open up (O), Power Steering Pressure level Switch Circuit Did Not Modify States (R)
53 - Throttle Position Sensor Circuit In a higher place Maximum Voltage (CM,O)
54 - Intake Air Temperature/Air Charge Temperature Circuit Open (CM,O,R)
55 - Key Power Check (R)
56 - Mass Air Flow/Vane Air Flow Sensor Circuit Above Maximum Voltage (O,CM,R), MAF Sensor short to power (CM,R), Transmission Fluid Temperature Excursion Open (CM,O)
57 - AXOD Neutral pressure switch circuit failed open up (CM)
58 - Idle Tracking Switch Circuit Open up Or Grounded -CFI (O,R), Vane Air Temperature Sensor Input Greater Than Cocky Exam Maximum -EFI (CM,O)
59 - 2–3 Shift Mistake (CM), AXOD four/3 Pressure level Switch Circuit Failed Closed (O), AXOD 4/3 Pressure Switch Circuit Failed Open (C)
61 - ECT Sensor Circuit Grounded (O,CM,R)
62 - Torque Converter Clutch Mistake (C,Chiliad), AXOD four/three Or 3/2 Pressure Switch Circuit Grounded (O)
63 - Throttle Position Sensor Circuit Below Minimum Voltage (O,CM,R)
64 - Intake Air Temperature/Air Accuse Temperature Circuit Grounded (O,CM,R)
65 - Transmission Control Switch/Overdrive Cancel Switch Circuit Did Not Change States (R)
66 - , MAF bespeak beneath minimum test voltage of .4vdc (O,CM,R), Transmission Fluid Temperature Circuit Grounded (CM,O)
67 - Park Neutral Position Switch Circuit Open; A/C On -Manual (O), Transmission Lever Position Sensor Out Of Range/A/C On (CM,O), Clutch Switch Circuit Failure (CM)
68 - Transmission recently overheated, or TOT sensor intermittently failed beneath 0.two volts (CM)
69 - 3–4 Shift Fault (CM)
71 - Software re-initialization detected or Cluster Control Assembly excursion failed (CM)
72 - Insufficient Manifold Accented Pressure/Mass Air Flow Change During Dynamic Response Test (R)
73 - Bereft Throttle Position Change During Dynamic Response Test (O,R)
74 - Restriction On/Off Circuit Open up–Not During Self Examination (CM,R)
75 - Restriction On/Off Circuit Airtight/ECA Input Open (R)
76 - Bereft Vane Air Flow Sensor Output Alter During Dynamic Response Test (R)
77 - Operator Error Dynamic Response Test (R)
78 - Re-Initalization Cheque (R)
79 - A/C On/Defrost On During Self Exam (O)
81 - Secondary Air Diverter Circuit Failure (O)
82 - Secondary Air Bypass Circuit Failure (O)
83 - EGR Control solenoid circuit failure (O)
84 - EGR Vacuum Regulator (EVR) Control Circuit Failure (O)
85 - CANP Excursion Failure (O)
86 - Adaptive fuel limit reached (CM), three – four Shift solenoid circuit failure (O)
87 - Primary Fuel Pump Circuit Failure (CM,O)
88 - Loss Of Dual Plug Input Command (CM), Throttle Kicker Fault (?)
89 - Converter clutch solenoid circuit failure (CM)
91 - o2 Sensor Circuit Indicates Lean -commuter side(R), No o2 Sensor Switching Detected. always lean -driver side(CM), Shift Solenoid i Circuit Failure (O)
92 - o2 Sensor Circuit Indicates Rich -driver side(R), No o2 Sensor Switching Detected. always rich -commuter side(CM), Shift Solenoid 2 Circuit Failure (O)
93 - Converter Clutch Solenoid Circuit Failure (O)
94 - Secondary Air Injection Inoperative. bank 2, driver side (R), Torque Converter Clutch Solenoid Excursion Failure (O)
95 - Fuel Pump Circuit Open-PCM To Motor Ground (CM,O)
96 - Fuel Pump Circuit Open-Battery To PCM (CM,O)
97 - Transmission Control Indicator Lamp Circuit Failure (O)
98 - Difficult Fault Present (R)
99 - Electronic Force per unit area Command Circuit Failure (CM,O)

Cylinder Residue Test Codes
x - Cylinder #one Failed Cylinder Rest Test
twenty - Cylinder #2 Failed Cylinder Balance Examination
30 - Cylinder #3 Failed Cylinder Balance Test
40 - Cylinder #4 Failed Cylinder Residual Examination
50 - Cylinder #5 Failed Cylinder Balance Test
60 - Cylinder #half dozen Failed Cylinder Remainder Test
seventy - Cylinder #7 Failed Cylinder Residue Examination
80 - Cylinder #8 Failed Cylinder Balance Test
90 - All cylinders passed Cylinder Residue Test

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Terminal edited past TENGRAM; 03-thirteen-2011 at 02:40 AM.

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Source: http://dfwmustangs.net/forums/showthread.php?t=7908