Code Definition

P1273 — Accelerator pedal position sensor 1/3 signal fault

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Isuzu

About P1273

P1273 is a manufacturer-specific powertrain diagnostic trouble code recorded for Isuzu vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1273 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1273 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This accelerator pedal assembly uses three accelerator pedal position sensors so the ECM has redundant confirmation of driver demand in the electronic throttle system. DTC P1273 sets when the ECM detects that the accelerator pedal position sensor 1 and sensor 3 signals do not agree within their expected relationship. Each sensor uses its own reference and ground and follows pedal travel with a defined ratio, so disagreement between sensor 1 and sensor 3 causes the ECM to lose confidence in the pedal input and limit power. The driver typically notices reduced power, poor throttle response, a fo...

Join TaT to view the complete code information and diagnostic details.

Quick Facts