Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [obd-i]

21 questions
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Can I use an OBD2 Scan Tool on older GM vehicle?

I can get an adapter that connects my OBD2 scan tool to my 12 pin GM scan tool connection. But will the tool be able to read the codes and tell me anything useful? Or do I need to get a scan tool that is also aware of OBD-1 or GM specific codes? I…
Jim
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Do these 02 Sensor readings from obd1 look correct?

I have an issue at MOT test where I get high CO readings. I've triple checked the following: Exhaust leaks New downpipe Air/Vacuum leaks Compression MULTEC electronic Carb new idling control stepper Injector test Plugs/leads/coil/distributor/rotor…
Andrew
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Is there a viable option for updating OBD-I to OBD-II in order to increase possibility of engine tuning?

I've been told this is a terrible idea and just wanted greater confidence even though the warning against has been taken. I want to be able to fine tune a 1990 car with an OBD-I port in addition to adding features such as launch control.…
Adrian Stubbs
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90 Subaru Legacy - Pull Codes

I have a 10/89 Subaru Legacy I am working on. OBDI most likely, but trying to figure out how to get the check engine light to blink and do its thing. We've pulled the panel under the steering column and can't really find the usual black and green…
Matt
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1987 GMC Sierra - Can't connect to OBD diagnostic connector

I own a 1987 GMC Sierra and it has an ECU, I took it to a workshop to see if I've any issues, when they tried to connect a diagnostic reader to the connector (underneath the steering wheel) they couldn't. So they told me to replace the connector as…
user15878
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Live scan tool for OBD 1.5 GM transitional?

1995 S-10 Blazer 4.3L Vortec V6 (vin W) with Powertrain Control Module (PCM) 1995 was the OBD transitional year for GM. The PCM itself is OBDI, but the interface connector has the 16-pin D-style OBDII plug. Therefore, most inexpensive OBDII scan…
Sparky
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CEL 12, 21, and 55 on '94 Jeep Grand Cherokee

So, I've pulled the codes from my car based on the helpful information provided here: Check Engine Light on '94 Jeep Grand Cherokee Now, I need just a little help understanding what the codes actually mean. The translations below are taken directly…
Iszi
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10/89 (1990) Subaru Legacy EJ22 - OBDI Code 45

10/89 Subaru Legacy EJ22. NA. Multiport Fuel Injection. Throwing... Code 45: Pressure duty solenoid (turbo)/atmospheric pressure sensor circuit (non-turbo) Where is this thing located? I have 2 guesses but want to make sure... Guess 1)…
Matt
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OBD/OBD2 port on a 1993 mitsubishi triton MJ

Does anyone know if there is an ODB2 diagnostics port on a 1993 Mitsubishi Triton MJ 4x4 Ute?
Tim
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Check Engine Light on '94 Jeep Grand Cherokee

How do I get Check Engine Light codes (OBD-I) from a '94 Jeep Grand Cherokee, and where can I look them up?
Iszi
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What is the difference between OBD1 and OBD2?

In my car (BMW E46 323I 1998) I have both connectors, that is, the 20-pin OBD1 and the OBD2, what is the difference between the two, I am referring rather to the functionality in my car, that is . OBD1: OBD2: With one I can somehow access the…
David Gonzalo
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Does OBD2 Hud Display use battery if only the cable is connected but not the device itself?

I have an OBD2 hud display. It consists of the obd2 cable, and the device itself. Cable can disconnect from the device. If I leave the cable plugged in, but the device is disconnected from it, does it still drain battery? The cable itself? In other…
Antonis
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1994 Ford Aspire: Different computer for automatic vs manual?

This is a 1994 Ford Aspire (prior to OBD II, fortunately). It has a simple 3-speed automatic with no computer controls. It needs to pass smog, so I can't just gut the emission controls, and my "Check Engine" light needs to work properly because…
Harper - Reinstate Monica
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The HG fell from 22 to 18 after 'addressing' post-supercharger intake leaks

I have an ODB 1 supercharged 540I/6 (E34 1995 if that matters) that was hitting 10 PSI of boost relatively easy last summer. The car has been sitting for a while, and the boost was barely touching 5 PSI when I drove it last week. The vacuum gauge at…
Aleksey Korzun
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1995 VW Eurovan OBD I to OBD II adapter

My 1995 Eurovan has a check engine light coming on. I have a standard OBD II reader but this vehicle requires a OBD I reader. I see they sell OBD I to OBD II adapters online but I have read that with these VW's I won't be able to pull codes even…
Xyourobob
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