Fault Family System: Powertrain (P-Codes) 8 SAE Codes

Clutch Switch Circuit

Diagnostic & Technical Explanation

Code P0704 (Clutch Switch Input Circuit) sets when the ECM/TCM sees an implausible signal, an open/shorted circuit, or a disagreement between redundant clutch switches used to confirm the clutch pedal is depressed for starting interlock and shift control. Causes are a maladjusted or worn clutch switch, a switch plunger not being contacted by the pedal arm, or corroded/chafed wiring at the pedal bracket.

These 8 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 8 times.

Codes in this family (8)

Code	Definition	Repair coverage
P0704	Clutch Switch Input Circuit	4 ranked fixes
P0830	Clutch Pedal Switch A Circuit	4 ranked fixes
P0831	Clutch Pedal Switch A Circuit Low	4 ranked fixes
P0832	Clutch Pedal Switch A Circuit High	4 ranked fixes
P0833	Clutch Pedal Switch B Circuit	4 ranked fixes
P0834	Clutch Pedal Switch B Circuit Low	4 ranked fixes
P0835	Clutch Pedal Switch B Circuit High	4 ranked fixes
P083F	Clutch Pedal Switch A/B Correlation	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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