Question about 1995 Oldsmobile 88

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Check engine light on code P1640

Hi, my name is Raul i have a 1995 Royal eighty eight 3.8 v 6 i got a code
reading P1640 can anybody tell what this code means? Thanks

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  • Anonymous Mar 16, 2014

    how do you replace a brake line on a 1995 olds eighty eight



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It means driver 1 input high hope this helps

Posted on Oct 23, 2008


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I replaced plugs/wires/and coil pack on 1998 Oldsmobile Eighty-eight. Still throw codes for random misfire. ANy ideas?

Possible "crank position sensor", but also inspect the harmonic balancer coming apart, the back of it has the on/off window plate that the ckp reads for ecm functions.

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My Petcock /drain plug for my Oldsmobile 1995 88 royal broke off while trying to tighten it how can I fix it without buying a new Radiater ?

So if it is tight and it does not leak, leave it. Just remember you will have to remove the Radiator next time you flush it. It is a 1995, so unless it is a keepsake or show piece, then leave it.

The petcock is usually metal at that year unless it was replace.


Nov 19, 2011 | Cars & Trucks

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How to tell if the o2 sensor is bad?

An O2 sensor that is not functioning correctly or is reading a lean or rich fuel mixture turn on the check engine light in the dash, this is an Orange indicator. There are other reasons like the heater circuit in the O2 is defective, that is a different code. On this car you can read the signal out of the O2's using a special tool called a scanner, it plugs into the diagnostic port under the dash in front of the driver.

Sep 25, 2011 | 1995 Oldsmobile Eighty Eight

2 Answers

Looking for the correct spark plug wire placement on a 1995 oldsmobile 88 LSS

I'm assuming that you are refer to the "firing order", so check this...

1995 Oldsmobile Eighty-Eight Royale FWD 3.8 liter V-6 VIN "K"
1995 Oldsmobile Eighty-Eight Royale FWD 3.8 liter SC V-6 VIN "1"


1995 Oldsmobile Eighty-Eight Royale FWD 3.8 liter V-6 VIN "L"


Hope helps (remember comment and rated this).

Jul 22, 2010 | 1995 Oldsmobile Eighty Eight

1 Answer

Hi, my name is Raul, I own a repair shop and I

I know if a fuel pressure regulator diaphram goes, it will emit fuel fumes in engine compartment. may not be but this is worth a try. a leaking regulator can cause hard starting, poor fuel economy, stalling, check engine light, gas smell under hood. take a fuel pressure reading. In most of the cases, the fuel pressure should read 45 p.s.i. to 55 p.s.i. for the injection mechanism and 14 to 18 p.s.i. in a throttle body injection assembly. Even a slight variation from the specified extremes may be acceptable, but a large deviation is a sign of problem and bound to result in engine failures. check fuel filter first.

May 15, 2010 | 2000 Jeep Grand Cherokee

2 Answers

Need firing order for a 1994 88 delta royal

1994 Oldsmobile Eighty-Eight Royale FWD 3.8 liter V-6


Good luck (remember rated this help).

Nov 26, 2009 | 1994 Oldsmobile 88

1 Answer

I have two codes on my 1995 oldsmobile eighty-Eight P1640 P1670 what do they mean.

P1640 Driver 1-Input High Voltage
P1670 Driver 4
have a look here for more codes and info......if this helps, would you leave feedback for me please....thanx

Sep 16, 2009 | 1995 Oldsmobile Eighty Eight

1 Answer

What does code 12,63 and 65 mean for a 1989 royal---thanks

Code 12 is always the first code flashed it is just telling you that you have good communication with the ECM,your other 2 codes are for a O2 sensor problem.

Aug 27, 2009 | 1989 Oldsmobile Eighty Eight Royale

1 Answer

Where is the crank sensor usually located at on1995 oldsmobile 88

3.8 right? Behind the crankshaft pulley (harmonic balancer)

Jun 05, 2009 | 1995 Oldsmobile Eighty Eight

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