Hi I have a 93 towncar that's having EGR problems. Any knowledgeable help on this subject will be greatly appreciated. I had past problems where I had to change my EGRr valve and sensor now I recently did a KOEO computer check of my own and a code 337 came up. A code 337 is EGR sensor circuit above max voltage. I started doing research and I read somewhere that to narrow down the problems I should unhook the EGR sensor and run another KOEO test and see if I get a code 327. Well I did get that 327 code.... Can anyone help?
1993 Towncar Code 337 EGR problems
- Thread starter 93Linc
- Start date
Town
Senior Member
Since you got code 327, Ford recommend:
DL6 MEASURE VREF CIRCUIT VOLTAGE AT PFE/DPFE SENSOR
- Key off.
- PFE/DPFE sensor disconnected.
- Key on, engine off.
- Measure voltage between VREF circuit and SIG RTN circuit at the PFE/DPFE sensor vehicle harness connector.
- Is voltage between 4.0 and 6.0 volts?
Yes
REPLACE PFE/DPFE sensor.
RERUN «Quick Test».
No
GO to Pinpoint Test Step «C1».
For step C1, the following applies:
C1 CHECK VEHICLE BATTERY POWER CIRCUIT
- Key off.
- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.
- Install breakout box and connect PCM to breakout box.
- Key on, engine off.
- Measure voltage between Test Pin 37 at the breakout box and SIG RTN circuit in the Data Link Connector (DLC). Note voltage.
- Measure voltage across battery terminals. Note voltage.
- Are both voltages greater than 10.5 volts, and are both voltages within 1.0 volt of each other?
Yes
GO to «C2».
No
Key Off, RECONNECT sensor (if applicable).
For 2.3L Mustang, Tempo/Topaz, Taurus/Sable, Taurus SHO, Thunderbird SC and Continental:
GO to «X1».
For Mark VIII:
GO to «XB1».
For all others:
GO to «B1».
EGR sensor issues do not usually affect driveability, so do you have a check engine light on?
Good luck.
DL6 MEASURE VREF CIRCUIT VOLTAGE AT PFE/DPFE SENSOR
- Key off.
- PFE/DPFE sensor disconnected.
- Key on, engine off.
- Measure voltage between VREF circuit and SIG RTN circuit at the PFE/DPFE sensor vehicle harness connector.
- Is voltage between 4.0 and 6.0 volts?
Yes
REPLACE PFE/DPFE sensor.
RERUN «Quick Test».
No
GO to Pinpoint Test Step «C1».
For step C1, the following applies:
C1 CHECK VEHICLE BATTERY POWER CIRCUIT
- Key off.
- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.
- Install breakout box and connect PCM to breakout box.
- Key on, engine off.
- Measure voltage between Test Pin 37 at the breakout box and SIG RTN circuit in the Data Link Connector (DLC). Note voltage.
- Measure voltage across battery terminals. Note voltage.
- Are both voltages greater than 10.5 volts, and are both voltages within 1.0 volt of each other?
Yes
GO to «C2».
No
Key Off, RECONNECT sensor (if applicable).
For 2.3L Mustang, Tempo/Topaz, Taurus/Sable, Taurus SHO, Thunderbird SC and Continental:
GO to «X1».
For Mark VIII:
GO to «XB1».
For all others:
GO to «B1».
EGR sensor issues do not usually affect driveability, so do you have a check engine light on?
Good luck.
Kyle Elliott
Junior Member
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- May 27, 2016
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My check engine light was on on my 93 i had to take the aluminum peice off on top of the intake and clean the black junk out and the check engine light went off directly they got a video on you tube of how to do it
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