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2001 Ford F-150 Code P705 Triggered Only When Using Plow

Model: 2001 F-150 Fault Code: P0705 Posted: 2008-03-03 18:31

I own a 2001 Ford F-150 (7700) equipped with a plow attachment. Recently, I've been experiencing Diagnostic Trouble Code P705, which indicates a 'Transmission Sensor Circuit Malfunction (PRNDL)' — but only when the plow is actively in use. The code does not appear when driving without the plow attached. Given that this fault code relates to the transmission's PRNDL sensor, I'm wondering if the plow setup or its operation is causing abnormal shifting behavior. Could the constant engagement between drive and reverse during plowing be triggering the issue?

Related fault codes

P0705

Comments (2)

Anonymous 2008-03-03 21:04

The frequent shifting between drive and reverse when using the plow is likely causing the P705 code to activate. Try driving the same route without the plow attached to see if the code appears. It's possible that the plow attachment itself — or its electrical connection — is interfering with the transmission sensor signals.

Anonymous 2008-03-04 08:38

Thanks for the insight! I'll test the vehicle without the plow connected and monitor whether the P705 code appears. My initial suspicion was that the constant shifting during plowing might be causing the issue. This is a helpful suggestion to validate.