Please help me. i'm a girl and i don't know much about
cars. i was told that the ECM of my car displays code 52. i
looked for free service manual in the net but i'm unsuccessful. i
don't have a manual. what does it mean? what can i
do? thank you so much.
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Re: electronic control module: error in code 52
I will be glad toassist you.
DTC 52 on a 93 Corolla indicates a problem with the "Knock Sensor" or its circuitry. This sensor is basically a piezoelectric crystal inside a metal housing, that detects "knock" or "predetonation" in the engine, and transmits that info re the "knock" back to the ECU. Most likely, replacement of the sensor, or a repair of the wiring harness will cure your problem, if you engine is running fine, and not making any strange sounds. I hope this answers your question. If you have any others, please feel free to comment back to me. Have agreat day!
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1991 is pre-OBD2. code readers will not work.
however, all is not lost. Many cars have an alternate way of reading codes from the computer.
Toyota has a block under the hood and you short couple wires together and count engine light flashes
Chrysler you can turn the ignition key on and off a few times and count engine light flashes
in your case for GMs from 1982 to 1995
1: find the 12 pin connector under the dash and short the upper two rightmost terminals.
with the ignition "ON" and engine not running. The system will enter the diagnostic mode. In this mode, the computer will display a Code 12, three consecutive times, by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" or light. A Code 12 consists of one flash, a short pause, then two flashes in rapid succession.
2:. After Code 12 is displayed, any stored trouble codes will be displayed by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" light. All codes are displayed 3 times each then a code 12 will repeat. In the diagnostic mode, the computer will also energize all computer controlled relays and solenoids.
Tech -- GM 2 Digit codes for 82 and up (non OBD-II)
code - code definition
12- diagnostic mode
13- 02 sensor or circuit
14- coolant sensor or circuit/ high temp indicated
15- coolant sensor or circuit/ low temp indicated
16- system voltage out of range
19- crankshaft position sensor or circuit
21- throttle position sensor or circuit- voltage high
22- throttle position sensor or circuit- voltage low
23- mixture control (m/c) solenoid or circuit (carbureted models)
23- manifold air temperature (mat) sensor or circuit (1990 and earlier models)
23- intake air temperature (iat) sensor circuit (fuel-injected models)
24- vehicle speed sensor (vss) or circuit
25- manifold air temperature (mat) sensor or circuit - high temperature indicated (1990 and earlier models)
25- intake air temperature (iat) sensor or circuit - high temperature indicated (1991 and later models)
26- quad driver module circuit
27- quad driver module circuit
28- quad driver module circuit
29- quad driver module circuit
31- park/neutral position (pnp) switch circuit
32- baro sensor or circuit (carbureted models)
32- egr circuit (fuel-injected models)
33- manifold absolute pressure (map sensor signal voltage high
33- mass air flow (maf) sensor or circuit - excessive airflow indicated
34- manifold absolute pressure (map) sensor signal voltage low 34- mass air flow (maf) sensor signal - low airflow indicated
35- idle speed control (isc) switch or circuit (shorted) (carbureted models)
35- idle air control (iac) valve/ circuit
38- brake switch circuit
39- torque converter clutch (tcc) circuit
41- no distributor signals to ecm, or faulty ignition module ( carbed models)
41- cylinders select error- mem-cal or ecm problem ( fuel-injected models
41- cam sensor circuit (3.8 engine)
42- bypass or electronic spark timing (est) circuit
43- low voltage at ecm terminal l (carbureted models)
43- knock sensor circuit
44- oxygen sensor or circuit - lean exhaust detected
45- oxygen sensor or circuit - rich exhaust detected
46- power steering pressure switch circuit
48- misfire diagnosis
51- prom, mem-cal or ecm problem
52- calpak or ecm problem
53- egr fault (carbureted models only)
53- system over-voltage (ecm over 17.7 volts)
54- mixture control (m/c) solenoid or circuit (carbureted models)
54- fuel pump circuit (1986 and later models)
55- oxygen sensor circuit or ecm
55- fuel lean monitor (2.2l engine)
61- oxygen sensor signal faulty (possible contaminated sensor)
62- transaxle gear switch signal circuits
63- manifold absolute pressure (map) sensor voltage high (low vacuum detected)
64- manifold absolute pressure (map) sensor voltage low (high vacuum detected)
66- pressure sensor or circuit air conditioning
Error Code:P0130 Fault:
Oxygen Sensor (O2S) 1, Bank 1 - Circuit Malfunction Possible Cause:
Malfunction Indicator Lamp (MIL) Triggered on first occurrence.
-Oxygen sensor (O2S).
-Engine control module (ECM).
Error Code:P0505 Fault:
Idle Speed Control (ISC) System - Malfunction Possible Cause:
-Idle speed control (ISC) actuator/Idle air control valve (IAC) valve.
-Throttle valve tight/sticking.
-Engine control module (ECM).
Error Code: P0100 Fault Location:
-Mass Air Flow (MAF) Sensor/Volume Air Flow (VAF) Sensor - Circuit --Malfunction Possible Cause:
-Mass air flow (MAF) sensor.
-Volume air flow (VAF) sensor.
-Engine control module (ECM).
Error Code: P1491 Fault:
Exhaust Gas Recirculation (EGR) Valve Insufficient Lift Possible Cause: -Wiring harness.
-Engine Control Module (ECM)/Powertrain Control Module (PCM)
Error Code:P0966 Location:
-Pressure Control (PC) Solenoid B - Circuit Low Possible Cause:
-Wiring short to earth.
-Pressure control (PC) solenoid.
-Engine control module (ECM)/Powertrain control module -(PCM)/Transmission control module (TCM) .
Internal Control Module Read Only Memory (ROM) Error
P0605 FORD Description
The ECM consists of a microcomputer and connectors for signal input and output and for power supply. The ECM controls the engine. Most common cause of this code is a defective ECM (Electronic Control Module), in your year the part is known as the PCM (Powertrain control module)
Must be cap is loose again or the cap was not fitted properly and so the check engine light is coming ON again.But if the light is ON again that means the ECM has stored error codes in it.The ECM means Electronic control module,also called cars computer.Get your car scanned at diagnostic scan center,.There you can get the exact error codes for the check engine light coming ON.At www.autozone.com its absolutely free to get car scanned.There you can get the codes for free.As per error codes you can replace the faulty part.-------------- This will help.Thanks.Helpmech.
ECM Trouble Codes
12-Distributor signal fault
19-Fuel pump circuit fault (short)
30-Idle speed control (isc) motor rpm out of range
41-Camshaft position sensor (CMP) or circuit fault
52-Electric control module (ECM) reset
91-Park neutral position switch or coicuit fault
BCM Trouble Codes
10-Outside temperature sensor or circuit fault
32-Electronic control module (ECM) to Body control module (BCM) fault loss of communcation
The ECM is located under the dash, on the passenger side.
It is a silver box with 4 plug-in wiring harnesses, rioughly 8" x 5"x 2"
It may help if you remove the glove box door, in order to see it.
Hope this helps.