O = Key on engine off
R = Key on engine running (ER)
C = continuous memory
*NOTE* some codes not listed do not apply. PM me if you are looking for a code that is not listed.
11) system pass (O/R/C)
12) cannot control RPM during ER selftest high RPM check (R)
13) cannot control RPM during ER selftest low RPM check (R)
14) PIP circuit failure (C)
15) ECM Read Only Memory failed (O)
ECM Keep Alive Memory failed (C)
16) Ignition Diagnostic Monitor(IDM)signal not recived (O)
RPM too low to perform HEGO test (R)
17) RPM below self-test limit with ISC off (R)
18) SPOUT circuit open or spark angle(SAW) failure (R)
loss of tach input/IDM circuit failure/ SPOUT circuit grounded (C)
19) failure in ECM internal voltage (O)
RPM erratic, dropped too low during test (R)
cylinder ID (CID) circuit failure (C)
21) ECT out of self test range (O/R)
22) MAP/BP sensor out of self test range (O/R/C)
23) TPS out of self test range (O/R/C)
24) ACT(IAT) out of sell test range (O/R)
29) Insufficient input from VSS (C)
31) EVP circuit below minimum Voltage (O/R/C)
32) EVP voltage below closed limit (O/R/C)
33) EGR valve opening not detected (R/C)
34) Insufficent EGR flow/ or EVP voltage above closed limit. (O/R/C)
35) EVP circuit above maximum Voltage. (O/R/C)
41) HEGO circuit indicates system lean, right side (R)
No HEGO switch detected - always lean, right side (C)
42) HEGO circuit indicates system rich, right side (R)
No HEGO switch detected - always right right side (C)
43) HEGO lean at wide open throttle (C)
44) Secondary air injection system inopterative, right side (R)
49) SPOUT signal defaulted to 10 degrees BTDC (C)
51) ECT sensor fault or circuit open (O/C)
53) TP circuit above maximum voltage (O/C)
54) ACT sensor fault or circuit open (O/C)
55) Key power input to ECM is open (R)
61) ECT sensor fault or cicuit grounded (O/C)
63) TP circuit below minium Voltage (O/C)
64) ACT sensor fault or circuit grounded (O/C)
65) Never went into closed loop fuel (C)
72) Insufficient MAP output change during Dynamic Response Test. (R)
73) Insufficient throttle position change (O)
Insufficient TP output change during Dynamic Response Test (R)
79) AC/Defrost on during self test (O)
84) EGR vacuum regulator (EVR) circuit failure (O/R)
85) Adaptive fuel lean limit reached (C)
Canister Purge (CANP) circuit failure. (O/R)
86) Adaptive fuel rich limit reached (C)
87) fuel pump primary circuit failure (O/R/C)
91) HEGO circuit indicates system lean, left side (R)
No HEGO switching detected, left side (C)
92) HEGO circuit indicates system righ, left side (R)
98) Hard fault is present - FMEM module. (R)
99) ECM system has not learned to control Idle. (R)
R = Key on engine running (ER)
C = continuous memory
*NOTE* some codes not listed do not apply. PM me if you are looking for a code that is not listed.
11) system pass (O/R/C)
12) cannot control RPM during ER selftest high RPM check (R)
13) cannot control RPM during ER selftest low RPM check (R)
14) PIP circuit failure (C)
15) ECM Read Only Memory failed (O)
ECM Keep Alive Memory failed (C)
16) Ignition Diagnostic Monitor(IDM)signal not recived (O)
RPM too low to perform HEGO test (R)
17) RPM below self-test limit with ISC off (R)
18) SPOUT circuit open or spark angle(SAW) failure (R)
loss of tach input/IDM circuit failure/ SPOUT circuit grounded (C)
19) failure in ECM internal voltage (O)
RPM erratic, dropped too low during test (R)
cylinder ID (CID) circuit failure (C)
21) ECT out of self test range (O/R)
22) MAP/BP sensor out of self test range (O/R/C)
23) TPS out of self test range (O/R/C)
24) ACT(IAT) out of sell test range (O/R)
29) Insufficient input from VSS (C)
31) EVP circuit below minimum Voltage (O/R/C)
32) EVP voltage below closed limit (O/R/C)
33) EGR valve opening not detected (R/C)
34) Insufficent EGR flow/ or EVP voltage above closed limit. (O/R/C)
35) EVP circuit above maximum Voltage. (O/R/C)
41) HEGO circuit indicates system lean, right side (R)
No HEGO switch detected - always lean, right side (C)
42) HEGO circuit indicates system rich, right side (R)
No HEGO switch detected - always right right side (C)
43) HEGO lean at wide open throttle (C)
44) Secondary air injection system inopterative, right side (R)
49) SPOUT signal defaulted to 10 degrees BTDC (C)
51) ECT sensor fault or circuit open (O/C)
53) TP circuit above maximum voltage (O/C)
54) ACT sensor fault or circuit open (O/C)
55) Key power input to ECM is open (R)
61) ECT sensor fault or cicuit grounded (O/C)
63) TP circuit below minium Voltage (O/C)
64) ACT sensor fault or circuit grounded (O/C)
65) Never went into closed loop fuel (C)
72) Insufficient MAP output change during Dynamic Response Test. (R)
73) Insufficient throttle position change (O)
Insufficient TP output change during Dynamic Response Test (R)
79) AC/Defrost on during self test (O)
84) EGR vacuum regulator (EVR) circuit failure (O/R)
85) Adaptive fuel lean limit reached (C)
Canister Purge (CANP) circuit failure. (O/R)
86) Adaptive fuel rich limit reached (C)
87) fuel pump primary circuit failure (O/R/C)
91) HEGO circuit indicates system lean, left side (R)
No HEGO switching detected, left side (C)
92) HEGO circuit indicates system righ, left side (R)
98) Hard fault is present - FMEM module. (R)
99) ECM system has not learned to control Idle. (R)