OBD2 Fault Code Library

Free lookup for thousands of OBD2 trouble codes: filter by family, read short meanings, and open deeper articles. Desktop ELM327 scanner with live data and AI guidance.

OBD2 symptoms

Look up diagnostic trouble codes by what the car is doing: misfire, overheating, rough idle, a check engine light, and other common symptoms.

P2692 — P2692 — Cylinder 7 Injector Data Incompatible. A fault in the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Typical causes: faulty fuel rail pressure sensor or wiring, vacuum or intake leaks skewing the mixture, contaminated or incorrect fuel.
P2693 — P2693 — Cylinder 8 Injector Data Incompatible. A fault in the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Typical causes: faulty fuel rail pressure sensor or wiring, faulty fuel pressure regulator, vacuum or intake leaks skewing the mixture.
P2694 — Cylinder 9 Injector Data Incompatible (P2694): a powertrain (engine/transmission) fault affecting the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Most often caused by vacuum or intake leaks skewing the mixture, clogged or leaking fuel injectors, faulty fuel pressure regulator.
P2695 — OBD2 code P2695 flags a problem with the fuel delivery and mixture control (cylinder 10 injector data incompatible). Short, gentle driving to a shop is usually possible. Common culprits: vacuum or intake leaks skewing the mixture, faulty fuel pressure regulator, faulty fuel rail pressure sensor or wiring.
P2696 — P2696 — Injector Data Incompatible. A fault in the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Typical causes: contaminated or incorrect fuel, faulty fuel pressure regulator, clogged or leaking fuel injectors.
P2698 — P2698 — Exhaust Aftertreatment Fuel Injector "A" Performance. A fault in the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Typical causes: contaminated or incorrect fuel, weak fuel pump or clogged fuel filter, clogged or leaking fuel injectors.
P2699 — OBD2 code P2699 flags a problem with the fuel delivery and mixture control (exhaust aftertreatment fuel injector "A" circuit low). Short, gentle driving to a shop is usually possible. Common culprits: contaminated or incorrect fuel, faulty fuel rail pressure sensor or wiring, weak fuel pump or clogged fuel filter.
P269A — Exhaust Aftertreatment Fuel Injector "A" Circuit High (P269A): a powertrain (engine/transmission) fault affecting the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Most often caused by vacuum or intake leaks skewing the mixture, contaminated or incorrect fuel, faulty fuel rail pressure sensor or wiring.
P269B — OBD2 code P269B flags a problem with the diesel glow plug system (exhaust aftertreatment glow plug control circuit/open). The car is usually drivable while you plan the repair. Common culprits: faulty glow plug relay or control module, corroded glow plug connectors, burned-out glow plug.
P269C — OBD2 code P269C flags a problem with the diesel glow plug system (exhaust aftertreatment glow plug control performance). The car is usually drivable while you plan the repair. Common culprits: corroded glow plug connectors, burned-out glow plug, blown fuse in the glow plug circuit.
P269D — P269D — Exhaust Aftertreatment Glow Plug Control Circuit Low. A fault in the diesel glow plug system. The car is usually drivable while you plan the repair. Typical causes: blown fuse in the glow plug circuit, corroded glow plug connectors, burned-out glow plug.
P269E — Exhaust Aftertreatment Glow Plug Control Circuit High (P269E): a powertrain (engine/transmission) fault affecting the diesel glow plug system. The car is usually drivable while you plan the repair. Most often caused by burned-out glow plug, blown fuse in the glow plug circuit, corroded glow plug connectors.
P269F — OBD2 code P269F flags a problem with the diesel glow plug system (exhaust aftertreatment glow plug circuit/open). The car is usually drivable while you plan the repair. Common culprits: blown fuse in the glow plug circuit, damaged glow plug wiring or connector, faulty glow plug relay or control module.
P26A0 — OBD2 code P26A0 flags a problem with the diesel glow plug system (exhaust aftertreatment glow plug performance). The car is usually drivable while you plan the repair. Common culprits: burned-out glow plug, blown fuse in the glow plug circuit, damaged glow plug wiring or connector.
P26A1 — P26A1 — Exhaust Aftertreatment Glow Plug Circuit Low. A fault in the diesel glow plug system. The car is usually drivable while you plan the repair. Typical causes: blown fuse in the glow plug circuit, burned-out glow plug, faulty glow plug relay or control module.
P26A2 — OBD2 code P26A2 flags a problem with the diesel glow plug system (exhaust aftertreatment glow plug circuit high). The car is usually drivable while you plan the repair. Common culprits: faulty glow plug relay or control module, corroded glow plug connectors, damaged glow plug wiring or connector.
P2700 — Transmission Friction Element "A" Apply Time Range/Performance (P2700): a powertrain (engine/transmission) fault affecting the automatic transmission control. Short, gentle driving to a shop is usually possible. Most often caused by wiring or connector faults in the valve body harness, internal mechanical wear (clutches, torque converter), faulty transmission speed sensor.
P2701 — OBD2 code P2701 flags a problem with the automatic transmission control (transmission friction element "B" apply time range/performance). Short, gentle driving to a shop is usually possible. Common culprits: internal mechanical wear (clutches, torque converter), failed shift or pressure control solenoid, low or degraded transmission fluid.
P2703 — OBD2 code P2703 flags a problem with the automatic transmission control (transmission friction element "D" apply time range/performance). Short, gentle driving to a shop is usually possible. Common culprits: low or degraded transmission fluid, internal mechanical wear (clutches, torque converter), valve body wear.
P2704 — OBD2 code P2704 flags a problem with the automatic transmission control (transmission friction element "E" apply time range/performance). Short, gentle driving to a shop is usually possible. Common culprits: wiring or connector faults in the valve body harness, faulty transmission speed sensor, internal mechanical wear (clutches, torque converter).
P2705 — OBD2 code P2705 flags a problem with the automatic transmission control (transmission friction element "F" apply time range/performance). Short, gentle driving to a shop is usually possible. Common culprits: failed shift or pressure control solenoid, internal mechanical wear (clutches, torque converter), wiring or connector faults in the valve body harness.
P2706 — OBD2 code P2706 flags a problem with the automatic transmission control (shift solenoid f malfunction). Short, gentle driving to a shop is usually possible. Common culprits: valve body wear, internal mechanical wear (clutches, torque converter), faulty transmission speed sensor.
P2707 — OBD2 code P2707 flags a problem with the automatic transmission control (shift solenoid f performance/stuck off). Short, gentle driving to a shop is usually possible. Common culprits: low or degraded transmission fluid, faulty transmission speed sensor, internal mechanical wear (clutches, torque converter).
P2708 — P2708 — Shift Solenoid F Stuck On. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: valve body wear, failed shift or pressure control solenoid, faulty transmission speed sensor.