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Throttle Position Sensors


The Throttle Position Sensor, or TPS, measures the throttle position through changing voltage and sends the information to the ECU, or Engine Control Unit. The ECU uses this information along with other inputs to calculate the correct amount of fuel delivered to the engine for optimal air/fuel ratios.

Common causes of Throttle Position Sensor failure:
• Vacuum leaks
• Incorrectly adjusted Throttle Stop
• Wear and tear

Symptoms of a failing Throttle Position Sensor may include:
• Poor start or stalling
• Improper automatic transmission converter lockup
• Loss of power behavior
• Engine stumbling
• Check Engine Light on

The following OBD II error codes are the most commonly found with this product type. On-Board Diagnostic (OBD) systems are integrated into the computers of our vehicles to monitor emissions. The first generation of OBD requirements was implemented in California in 1988. Since then, these requirements were adopted by the US EPA for all passenger vehicles manufactured after 1996. In 2005, OBD systems then also became mandatory for heavy-duty vehicles and engines up to 14,000 lbs. GVWR. In 2008 the EPA finalized OBD regulations for 2010 and later heavy-duty engines used in highway vehicles over 14,000 lbs. GVWR and made changes to the OBD requirements for heavy-duty applications up to 14,000 lbs. GVWR to align them with requirements for applications over 14,000 lbs. GVWR.

OBD II is now the standard in diagnosing vehicle emissions in. The codes listed for this product type are common instances that may relate to your vehicle and should be used as a guide only. Walker Products will not be held responsible for any use of this information. It is highly suggested that you consult with a professionally trained mechanic prior to any automotive repair, and that you follow all vehicle manufacturer and EPA guidelines for removal, replacement, diagnostics, OBD II code clearing, ECU and PCM relearn procedures.

o P0068 MAP/MAF – Throttle Position Correlation
o P0120 Throttle/Pedal Position Sensor/Switch “A” Circuit
o P0121 Throttle/Pedal Position Sensor/Switch “A” Circuit
o P0122 Throttle/Pedal Position Sensor/Switch “A” Circuit Low
o P0123 Throttle/Pedal Position Sensor/Switch “A” Circuit High
o P0124 Throttle/Pedal Position Sensor/Switch “A” Circuit Intermittent
o P0220 Throttle/Pedal Position Sensor/Switch “B” Circuit
o P0221 Throttle/Pedal Position Sensor/Switch “B” Circuit
o P0222 Throttle/Pedal Position Sensor/Switch “B” Circuit Low
o P0223 Throttle/Pedal Position Sensor/Switch “B” Circuit High
o P0224 Throttle/Pedal Position Sensor/Switch “B” Circuit Intermittent
o P0225 Throttle/Pedal Position Sensor/Switch “C” Circuit
o P0226 Throttle/Pedal Position Sensor/Switch “C” Circuit
o P0227 Throttle/Pedal Position Sensor/Switch “C” Circuit Low
o P0228 Throttle/Pedal Position Sensor/Switch “C” Circuit High
o P0229 Throttle/Pedal Position Sensor/Switch “C” Circuit Intermittent
o P0510 Closed Throttle Position Switch
o P060E Internal Control Module Throttle Position Performance
o P061F Internal Control Module Throttle Actuator Controller Performance
o P0638 Throttle Actuator Control Range/Performance
o P0639 Throttle Actuator Control Range/Performance
o P063E Auto Configuration Throttle Input not Present
o P069F Throttle Actuator Control Lamp Control Circuit
o P2072 Throttle Actuator Control System – Ice Blockage
o P2073 Manifold Absolute Pressure/Mass Air Flow – Throttle Position
o P2074 Manifold Absolute Pressure/Mass Air Flow – Throttle Position
o P2100 Throttle Actuator “A” Control Motor Circuit/Open
o P2101 Throttle Actuator “A” Control Motor Circuit Range/Performance
o P2102 Throttle Actuator “A” Control Motor Circuit Low
o P2103 Throttle Actuator “A” Control Motor Circuit High
o P2104 Throttle Actuator Control System – Forced Idle
o P2105 Throttle Actuator Control System – Forced Engine Shutdown
o P2106 Throttle Actuator Control System – Forced Limited Power
o P2107 Throttle Actuator Control Module Processor
o P2108 Throttle Actuator Control Module Performance
o P2109 Throttle/Pedal Position Sensor “A” Minimum Stop Performance
o P210A Throttle Actuator “B” Control Motor Circuit/Open
o P210B Throttle Actuator “B” Control Motor Circuit Range/Performance
o P210C Throttle Actuator “B” Control Motor Circuit Low
o P210D Throttle Actuator “B” Control Motor Circuit High
o P210E Throttle/Pedal Position Sensor/Switch “C”/”F” Voltage Correlation
o P2110 Throttle Actuator Control System – Forced Limited RPM
o P2111 Throttle Actuator Control System – Stuck Open
o P2112 Throttle Actuator Control System – Stuck Closed
o P2113 Throttle/Pedal Position Sensor “B” Minimum Stop Performance
o P2114 Throttle/Pedal Position Sensor “C” Minimum Stop Performance
o P2115 Throttle/Pedal Position Sensor “D” Minimum Stop Performance
o P2116 Throttle/Pedal Position Sensor “E” Minimum Stop Performance
o P2117 Throttle/Pedal Position Sensor “F” Minimum Stop Performance
o P2118 Throttle Actuator Control Motor Current Range/Performance
o P2119 Throttle Actuator Control Throttle Body Range/Performance
o P2120 Throttle/Pedal Position Sensor/Switch “D” Circuit
o P2121 Throttle/Pedal Position Sensor/Switch “D” Circuit
o P2122 Throttle/Pedal Position Sensor/Switch “D” Circuit Low
o P2123 Throttle/Pedal Position Sensor/Switch “D” Circuit High
o P2124 Throttle/Pedal Position Sensor/Switch “D” Circuit Intermittent
o P2125 Throttle/Pedal Position Sensor/Switch “E” Circuit
o P2126 Throttle/Pedal Position Sensor/Switch “E” Circuit
o P2127 Throttle/Pedal Position Sensor/Switch “E” Circuit Low
o P2128 Throttle/Pedal Position Sensor/Switch “E” Circuit High
o P2129 Throttle/Pedal Position Sensor/Switch “E” Circuit Intermittent
o P212A Throttle Position Sensor/Switch “G” Circuit
o P212B Throttle Position Sensor/Switch “G” Circuit Range/Performance
o P212C Throttle Position Sensor/Switch “G” Circuit Low
o P212D Throttle Position Sensor/Switch “G” Circuit High
o P212E Throttle Position Sensor/Switch “G” Circuit Intermittent
o P2130 Throttle/Pedal Position Sensor/Switch “F” Circuit
o P2131 Throttle/Pedal Position Sensor/Switch “F” Circuit
o P2132 Throttle/Pedal Position Sensor/Switch “F” Circuit Low
o P2133 Throttle/Pedal Position Sensor/Switch “F” Circuit High
o P2134 Throttle/Pedal Position Sensor/Switch “F” Circuit Intermittent
o P2135 Throttle/Pedal Position Sensor/Switch “A”/”B” Voltage Correlation
o P2136 Throttle/Pedal Position Sensor/Switch “A”/”C” Voltage Correlation
o P2137 Throttle/Pedal Position Sensor/Switch “B”/”C” Voltage Correlation
o P2138 Throttle/Pedal Position Sensor/Switch “D”/”E” Voltage Correlation
o P2139 Throttle/Pedal Position Sensor/Switch “D”/”F” Voltage Correlation
o P2140 Throttle/Pedal Position Sensor/Switch “E”/”F” Voltage Correlation
o P2163 Throttle/Pedal Position Sensor “A” Maximum Stop Performance
o P2164 Throttle/Pedal Position Sensor “B” Maximum Stop Performance
o P2165 Throttle/Pedal Position Sensor “C” Maximum Stop Performance
o P2166 Throttle/Pedal Position Sensor “D” Maximum Stop Performance
o P2167 Throttle/Pedal Position Sensor “E” Maximum Stop Performance
o P2168 Throttle/Pedal Position Sensor “F” Maximum Stop Performance
o P2172 Throttle Actuator Control System – Sudden High Air Flow Detected
o P2173 Throttle Actuator Control System – High Air Flow Detected
o P2174 Throttle Actuator Control System – Sudden Low Air Flow Detected
o P2175 Throttle Actuator Control System – Low Air Flow Detected
o P2176 Throttle Actuator Control System – Idle Position not Learned
o P2552 Throttle/Fuel Inhibit Circuit
o P2553 Throttle/Fuel Inhibit Circuit Range/Performance

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