Mustang, 1992 2.3L dual point OBD 1 error codes problem
Replaced O2 sensor, crank positioning sensor and ignition module the 1992 Ford Mustang 2.3L dual plug engine - it now runs smoother and appears to be fixed but I still get the following codes - 218 - loss of ignition diagnostic monitor signal left side, 223 - loss of dual plug inhibit control, 224 - power train control module detected coil 1,2,3,4 primary circuit failure dual plug, 543 - fuel pump secondary circuit failure battery to control module and on KOEO scan and on KOER scann 411 - cannot control RPM during KOER low RPM check. The tach reads 4000 RPM when ignition is off and during idle and sporadically there is a dead miss when running. Can you tell me what is the problem?
Re: Mustang, 1992 2.3L dual point OBD 1 error codes...
I have a 2.3L 92 mustang and had intermittent codes 223 and 224 and the RPM meter would report 1/2 the normal RPM even though the car idled at the normal RPM , I took the ICM out and had it checked at AutoZone and it wouldn't fail on their tester even after running it a dozen times. I did the ford resistance diagnostics and all the external stuff looked good. I even had new coils and wires put in 2-3 months ago since I did have a misfire problem back then but no codes associated with that. In the end I ordered a new ICM module on eBay for ~$90 and installed it and the problems went away. I read on other sites that people had similar random problems and they replaced the module as well. Guess the module goes bad after 22 years of use. :) BTW the ICM manufacturer wants you to put the 4th screw in so the heat sinking works right ( the module back is slightly curved making full contact dicey) but blind drilling and tapping the hole was a real pain but I got it done by taking the alternator off and using a Dremel tool. . The original screws are metric but I tapped the 4th hole as 8-32 and used a few washers to get the screw depth right. They also didn't include the dielectric grease so you need to get some of that as well before installation. Some manufacturers might include it so you have to check.
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position sensors have little to do with rough running engine
items like bad injectors, problem ignition control module, fuel pressure , HT leads valves, vacuum leaks all contribute to rough running
best run the fault codes first to determine what area to look at and fix the reported faults
Hope this helps you or future parties of intrest. P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1 P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2 I would get under your stang and gently clean outside portion of o2 sensors using a scotch brite. Also if you have so dielectric grease pull electrical connections to o2 sensors clean them and add grease. These trick eliminated the o2 sensor OBD1 codes on my 1987 Ford mustang gt
- 1/1 And 2/1 O2 sensors harness circuit shorted - 1/1 And 2/1 O2 sensors harness circuit connectors (wrong connection) - Faulty Powertrain Control Module (PCM)
P0040 CHRYSLER Description
At ignition on the Powertrain Control Module (PCM) checks the voltage on the ground side of the O2 sensor harness connector. If voltage is higher than two volts the P0040 code will set.
- 1/2 And 2/2 O2 sensors harness circuit shorted - 1/2 And 2/2 O2 sensors harness circuit connectors (wrong connection) - Faulty Powertrain Control Module (PCM)
P0041 CHRYSLER Description
At ignition on the Powertrain Control Module (PCM) checks the voltage on the ground side of the O2 sensor harness connector. If voltage is higher than two volts the P0041 code will set.
The ignition engine speed sensor input signal to Powertrain Control Module (PCM) or Electronic Control Module (ECM) is continuously monitored. The test fails when the signal indicates that 2 successive erratic profile ignition pickup (PIP) pulses occurred.
Symptoms: - Engine Light ON (or Service Engine Soon Warning Light) - Lack/Loss of Power - The engine may be harder to start - The engine may stumble or stall
When is the code detected? The P0320 code is triggered when 2 successive erratic PIP pulses are detected.
Possible Causes: - Loose wires/connectors - Faulty Crank Position Sensors - Arcing secondary ignition components (coil, wires and plugs) - Low battery charge - Powertrain Control Module
Possible Solutions: - Resecure loose wire or connectors - If battery charge is low, recharge or replaced battery - Replaced crank position sensor - Replaced starter motor