Plymouth Voyager & a Chevy Impala
A 1996 Plymouth Voyager and a 1995 Chevy Impala
A Plymouth Voyager with an HVAC code 15, and a LT1 Chevy Impala that stalls.
Question: 1996 Plymouth Voyager
Good Afternoon, I have a 1996 Plymouth Voyager with both the recirculation and the A/C lights blinking. I found details for a 1998 Voyager that said to set the blower to high etc, and what I get after the apparent test is done is the rear wiper button flashes once and the wiper intermittent blinks 5 times. Code 15? Any help would be appreciated.
A.T. L'Heureux
Answer: An HVAC code 15 indicates an open in the EVAPORATOR PROBE (EP) circuit. The EP is located in the evaporator core. The wires pass through a grommet. Remove the grommet and you can do the following test to check the circuit.
- Using a voltmeter, check Pin 1 of the evaporator probe wiring connector for 0.1 - 4.75 volts. If OK, go to Step 2. If not OK, if greater than 4.75 volts, check for loose or corroded connector, open circuit and repair as necessary.
- Using an ohmmeter, check Pin 2 for a good ground. If OK, go to Step 3. If not OK, check for loose or corroded connector, open or shorted circuit, and repair as necessary.
- If ground and power circuit are OK, replace Evaporator Probe.
- Once repairs are completed, press the intermittent button about 5 seconds until all LED's light to remove fault code from memory.
Question: 1995 Chevy Impala
Hi, Vincent. My 1995 LT1 Chevy Impala stalls at idle sometimes. I've had a scanner hooked up to it before that has gotten error codes indicating the right side (according to Haynes manual) or passenger side. I presume, O2 sensor needs replacing. Happened at 90,000 miles. Haven't been able to remove it yet, frozen on. Car still runs okay, but an independent O2 sensor (3rd) I installed in the H-pipe exhaust I had installed shows some leaning conditions at idle.
Ever heard of the possibility of cleaning up O2 sensors after removal? Could it be fuel injectors? How about cleaning these up after removal, like soaking them in something? Could it be the PCM? I just don't trust the brain and scanner set-up. Had an ignition failure prior and was chasing all sorts of misinformation with it. Turned out to just be a bad aftermarket ignition wire.
Anytime,
Bill Ricker
Answer: I've heard of cleaning O2 sensors before, I just never heard of it working. And the only way to clean a fuel injector is with an injector cleaning system.
There are several O2 sensor codes and I really wish you would have given me the exact code number. You have to be careful reading O2 sensor codes. There are O2 sensor ranging codes and lean/rich codes that mean there is a problem somewhere else, not a bad O2 sensor.
Without knowing what the codes are, there is not much more I can do for you.
